I did a quick google search yesterday trying to find one in my area and got a lot of corporate type responses eg fill out this form and check the website etc.

After all, square footage is about more than raw measurements; it’s about how seamlessly the space integrates into the home’s overall living enviroment.If you’re serious about making that office “count,” consider checking local guidelines or even chatting with a reputable appraiser in the Phoenix area..from what I’ve heard they’ve handled properties like this before.

He had to go to a bank and get a cashiers check.

If it was me...I'd check with zoning to find out how many dwelling units I could build, and I'd find what the requirements are for those units (type of house, height and setback restrictions, etc.).Then I'd find out what local builders think the cost to construct would be - just get a cost estimate per square foot for 2 or 3 different levels of finish.

We replaced the oven after about 5 months and it just came from that separate account.Also, forgive me if you are already doing this but make sure to keep your tenants SD in a completely separate account from your personal checking account.

Here are a few suggestions on how you can maximize the wealth of information available: Check out the blogs and podcasts, or take advantage of the search feature (magnifying glass).

@Arif GungorurMake sure you check any HOA or development restrictions.

Check out the CRREIA group which meets in Clifton Park for meetups.

You can check out their thoughts on how to approach seller financing here: Making Your Primary Residence the BEST Investment Ever (Better BRRRR!) 

It’s a good idea to have a plumber check this before proceeding.