I would suggest you make the request to have the tenants leave, AND, if it delays the transaction that's no skin off your back - just keep you lender/bank in the loop!

In my demographic I have not had to worry about that as I rent out to people with skin in the game.

I probably have less answers for you, and more questions...We don't really know your experience level, so my first question is, do you realize you typically have to have about 20-25% "skin" in the game for this purchase?  

As you can see, there are a lot of ways to skin the cat. 

Maybe they raise some equity direct from immediate family (IE - mom/dad/sister/brother/grandparents/uncles/aunts/cousins), but the majority of the skin in the game is the GP's own.

The idea of even a little bit of debt makes my skin crawl and want to run for cover. 

If you examine all of these questions, which we all read every day, there are a couple of apparent things missing that make them impossible to answer:1. skin in the game2. research done before posting3. why the poster is asking (background)4. camaraderie (just give me what I want, I have nothing to offer)

I did this a few years ago and it still looks good as new, but I recently read that its not recommended to use fix-it-all on the exterior of the home because it can absorb the moisture in the air and further rot the wood. 

Can it work though, yes, but have some skin in the game.

The advantage of porcelain and vinyl in Arizona (as opposed to real wood), is that you don't have to worry about moisture issues (or lack thereof).