my wife spends all day every day trying to keep it clean and the 4 of us use the same 3 rooms unless we have a large party which is often" Their house had an indoor basketball court.  6 bedrooms, theater, pool, 2 garages. 

For those who don't know, the Texas Association of Realtors have made an effort this year to lobby the Texas Legislature for some property tax relief.   

Your housing lobbying arms should absolutely lobby to have that overturned.

If you mean that you need to find that during the property search, you can contact the city as mentioned by @Jaysen Medhurst above or simply count the mailboxes in the lobby or where they are located. 

Plus you have very strong lobby in the thousand Friends of Oregon.. who watch every land use application usually will appeal to LUBA.. 

Also up in the air is exact timing of rolled over cap gains, with big funds lobbying for 360 days versus the proposed 180; lengthening the construction period beyond the suggested 30 months; and allowing interim profits to be rolled forward.All the same, looks like OZs will be a good alternative to 1031s.

By adding a 2 bedroom basement rental unit and a home theater

The stakes involved are also high enough that it would not be surprising to see the real estate lobby pursuing federal legislation to protect the system that they have created.

Any thoughts on including a theater room? 

In the basement 40X60 area he has a 12' bar, lament floating floor, pool table , sewing room, exercise room, laundry room theater room 24X30 with 12' retractable ceiling with 8 reclining movie chairs.