She sold me the deal because I promised not to tear the house down, and agreed to have her be the first one in the house when it was finished.2.

In this case, in my case, being me, being her, being this specific situation it just worked.The mailing piece really didn't do it.

This one time I called her to inquire about her being ready to sell, she said to me, "You don't need to call me all the time.

Since concrete is porous and water vapor can penetrate, vapor barriers may be desired under the floor.My house had an old garage transformed into part of the house and the skids were on tar. 

While I'm all for encouraging investment in our city (assuming of course it isn't slumlord type investment, we don't need any more of that) you're talking about what is most likely a full time endeavor and as far as long term appreciation, unless you hit it just right and hit an area that has a big gentrification component down the road, long term appreciation of any substantial amount is unlikely, so you're left with cash flow and when you're normally talking about older to just plain OLD housing stock, thus higher or much higher annual maintenance costs to keep a safe and habitable rental property and keep you off of the city's "slumlord radar" which you DO NOT want to get onto, combined with tenants who are often a real crap shoot (yes, you CAN find great tenants who care about keeping a decent home even in the poorest parts of town, we have decent people in all parts of this city who are trying to build a better life for themselves and their families, yet you will also run into many who don't care, who bring unforeseen issues which seem to ALWAYS=extra, unforeseen costs to the landlord, whether you're here on the ground fixing the issue yourself or DIY plus pro help when necessary, or long distance via a PM (always going to likely cost much more)) and the wonderful looking cash flow component, which due to the very likely lack of any appreciation component, is all that's left for profit potential, also can quickly vaporize in front of you!

@Herb MarshallTypically, governing documents with rental restrictions make it clear that the lot or any portion of the lot may not be rented.

Thanks, Herb.

Luckily through her being on here chatting with people we realized there is not one way to do anything.  

I guess I mean frame and vapor barrier.

I've used Vapor Pest control in the past.