I think 3 bathrooms are unnecessary. I guess you are using the word "bathroom" as an American euphemism for a toilet
. In Australia and Britain, the word "bathroom" refers to where you have a shower, or take a bath. We use the term "toilet" or "WC" or "lavatory" for the place for the relieving of bodily functions.
Some bathrooms have a toilet inside, but some don't. I think bathrooms with toilets inside are, frankly, unhygienic. Why combine a room with a toilet with a space used to get clean and brush your teeth? A space for cleaning could be shared, but one where there is a toilet as well, then there are problems. A person showering needs privacy, as does a person using the toilet. Sharing such a room at the same time isn't pleasant.
You could have 2 toilets and 1 bathroom (with basin, shower and bath tub) in a 3 bedroom house (as I do) and this is more than acceptable. 2 bathrooms and 2 toilets would also be ok, but 3 bathroom-toilets combined is over the top. Separate the toilet from the bathroom, that's my take on things. Much more hygienic and practical.