Best advise I can give, get a good screening done on prospective tenants. 

I personally would never have a breakout clause in most cases.Additionally, it sounds like you might not be screening tenants properly.

Listen to podcast 83http://www.biggerpockets.com/renewsblog/2014/08/14/bp-podcast-083-landlording-integrity-marcia-maynard/There is also a guide written somewhere on screening tenants.I highly recommend you listen to this podcast though. 

How can I screen them?

I know that @Brandon Turner I believe has a blog about screening and finding good tenants.

Besides the home, the park needs to be screened too to past our investor-friendly test.It sounds like this may be a MH investor aiming to sell their portfolio, or a small part of their portfolio.

If the well is dry you are drilling deeper, if the well is not making water like it use to it could just be screen is clogged with minerals like iron or calcium and would need a chemical treatment to open the screen along.  

This would have the dual benefit of giving you a head start on PM screening if you are looking to outsource that, plus they might have leads on owners that are looking to sell.  

If you screen your tenants right and treat them right, this is what can happen.

@Lew PayneI am advising folks in FLA, OH and CA to have a real estate sales license and use a RMLO to screen their tenant buyers as per the Ability to Repay Rules of the CFPB and the Dodd Frank law.Don't understand your post.