For the HVAC, I'd just question if that's the correct and best way to go about it, but I'm not an expert, but certianly you won't get interest listing a unit for rent or sale without HVAC.

I assume zero as he would have to reinvest all cash received to avoid all taxes, correct?

However, a simple security system would deter this.Personal Safety -  I assume you are using their ID to run a background check and deciding if their history affects your safety, correct?

True although the fires this year just adds to the reasons to leave California (excessive taxation and regulation, overbearing political correctness, downtowns littered with feces, etc.).

@Bob Dole please tell me you have a CPA and you're simply educating yourself so that you can verify what he is saying is correct? 

If I understood your reply correctly.

If you go this route, consider properties in higher cash-flow markets like the Midwest or Southeast.

First of all, you are on the right track regardless of the financing route you take.

Maybe the P trap under the sink is not filling with water correctly and allowing sewer gas to come back in.  

To determine the correct treatment, consider the RV's permanence, utility connections, and business use.This post does not create a CPA-Client relationship.