Leveling this up: Calculate sun angles at different times of the year to simulate light entering the house. Find out if some room is going to be unbearably hot in the summer because it's got too much full sunlight; make sure there are windows that can take maximum advantage of sunlight in the winter months; maximize opportunities to accidentally catch the sunset / sunrise.
We use it all the time for light studies. LAT / LONG inputs in Enscape. I've actually compared models to actual days and it's pretty f'n spot on.
I feel like at this point you should just hire an architect.
I did this. Less so for the sun light entering the windows (albeit a great idea), but more so for making sure I'd see the sunsets. There are great websites that will let you see the sunrise and sunset directions for any given day of the year.