Price for architectural services really depends upon the amount of work, the size of the home, the location, special problems, and the type of contract.  Ideally, in addition to what you have listed, you should also have the specifications and schedules for the windows, doors and room treatment.  Room treatments include all four walls, ceiling and floor finishes.  Although room treatments may not be required by the code official, they do come in handy for quotes.
 
Many architects base their fee upon a percentage of the total cost.  By the way, the total cost can include landscaping and other things you would think had nothing to do with the house.  As a designer, I have always quoted a flat fee if I do not design for free.

If we knew the area where you plan to build, then someone on this forum could advise you more easily.

In the South, a lot of builders and electricians do not want a plan for electrical.  Most homeowners do not relate to plans that well.  Most electricians that I have dealt with for the last 30 years would prefer to walk through the home during the structural stage with the homeowner and mark the location of switches and other electrical items.  However, if you plan to use chases in SIPs for electrical, then you will need an electrical plan before you order the SIPs. 

Over the years, I have been required to do only one HVAC plan.  As a general rule, provisions should be made for HVAC and duct work within the structure, but a drawn plan is not required for residences in my area.  If you do not plan ahead for HVAC, then you stand the risk of losing closet space or head room to fit in the duct work.  I have seen this happen many times. 

Some architects will not give up their right to copyright the plan.  Most will not allow the homeowner to share credit for the design.  Some will agree not to use your plan again but will insist on reserving the right to publish the plan, enter it into contests, etc.   Some architects will want more money for not being able to use the plan again. 

Maybe someone from another area or your area can further advise you.  If you happen to be building close to me, then I may be available to donate some time to your project. 

I have no idea of the fee structure in Kansas City for architects.  I suggest that you call architects in your area and ask them what they charge.  I do that in my area when I get too busy to do a design.  Most will gladly tell you a ballpark figure if you will tell them the size and answer a few questions.  Or ask builders.

Flat fees work well with some architects.  Watch out for extra charges for changes and hours consumed beyond a certain limit.  Their contract will usually state this hourly charge beyond the flat fee.

I do not see how anyone can design a home without furnishing window and door schedules.  This does not mean the brand has to be selected, but it does mean that the sizes and locations must be on the plans.

If the city and your builder do not need sections, then there is not much need for them.  Some banks have required sections. 

Room schedules are usually included by architects and designers.  The room schedule can show the color of paint and finish on each wall and ceiling, the style and size of trim, the floor covering such as carpet, tile, hardwood, etc.  Rooms with tile can require different preparation and materials than a room for carpet.  (Be aware that different floor coverings touching each other may not be the same height unless someone makes the necessary adjustments.)

If the architect wants too much to include the room schedule, then you and your wife can use a spreadsheet, etc. to make your own schedule since you will probably know what you want better than the architect.  Normally, the architect interviews you for your needs and desires and then prepares the info in a table.  Homeowners make changes as necessary and then the architect includes room schedule on the plans.

Unrelated items do not have to be a part of the design.  Most landscapers will include the design for free if they get the contract.  An architect's fee should not cover things that he spends absolutely no time on.  Have the architect spell out what his services will cover.  Most will charge extra for expenses such as blueprints and trips to the site.

Only a few of the architects that I know will supervise the construction.  Some are willing to make inspections at critical stages.  If you feel comfortable with your builder and that you can check his work for quality and compliance with the plans, then you may not need to pay the architect for this extra service.

My normal practice is to design the home and assist the homeowner to be his own builder.  If you have a good architect and a good builder, then it should be less stressful for you.  Be sure to study your plans closely before construction starts and then avoid making un-necessary changes after construction commences.

I do not see that designing for SIPs should cost more than stick framing.  In certain cases, you may need a structural engineer to sign and seal the plans (wet stamp).

Some architect's contract will state that although you pay him his fee for the design, you still do not own the design.  In fact, you may be limitied to building only one home with this plan.  This is put in contracts to try to prevent spec builders from paying one fee and using the plan over and over.  The best thing that you can do is ask the architect for a copy of his typical contract so that you can study it before you start bargaining.  Take it to your lawyer and/or attach it to an e-mail and send it to me. 

I will be traveling the next couple of days so maybe someone else will also assist you.