Depending on your design you may be able to mitagate some of the potential extra heat load with shading such as Bahama Shutters, larger overhang, or a ramada. The other problem with too many windows you need to consider is heat loss in the winter. Another option can be the use of a celestry to get light and heat to those parts of the house that do not have it. But you will still have to reduce glazing where there is too much.