Also, are those 1000 rentals section 8 or not? Are

Total Sales Price including Contract & Assignment is $ 90,000 plus closing cost.You could just have your TREC contract notarized and filed to eliminate investors going behind your back.

Get it notarized and add all others as @Dawn Anastasi suggested. 

Ask about her feelings on gender roles while dating ;)I agree with others that a prenup (and a notarized will) is also a good idea if you have significant assets, especially since you have a daughter.

I'd bet significant money the county recorder  doesn't require a buyer's doc.s be notarized "locally".

I want to ensure that both he and I are protected by signing a contract that outlines the terms and having it notarized.

Take notarized copies to the county and get the county's seal on the documents, then take it to the state and do the same. 

Once your friend serves (or not) the tenant (need to show 3 attempts on affidavit) you need to craft a simple affidavit of (non)service that needs to be signed and notarized by your friend.

If not, are they unwilling to pull a permit?

I will also get a signed and notarized Limited power of attorney so I never need their input again down the road to sell to my tenant buyer (I sell on a L/O and not owner financing) when they bring in new financing.