Looking at the floor plans, I am unsure where the garage would be.

Inside the house, one WiFi access point on a high shelf in the 'optional built in pantry' would provide decent coverage for the main floor.

Another WiFi access point on a high shelf in the closet for bedroom 3 would cover that floor. Master bath and laundry would have the weakest signal (relatively speaking) which seems ok to me.

For the basement I would suggest a third access point. There tends to be a lot of structure in the main floor and basement below, and metal ducting between the floors.

If WiFi penetration into the garage is marginal, mount a WiFI repeater up fairly high inside the corner nearest the house. That should provide a decent link speed back to the house and flood the garage with solid WiFi;