Even if they appreciate at the inflation rate, you still would have principal pay down of the entire balance and be happy.

For whatever the odd job I'd need done would be, isn't is easier and wiser to ask for a fixed price to do the job?

Back then, the Fed’s rate hikes caused investors to become less concerned about inflation, so mortgage rates fell.Mortgage rates eventually rose, and were higher in June 2006, at the end of the rate-hiking campaign, than they were at the beginning, two years earlier.In 2017, housing economists predicted mortgage rates would rise.

So if he manages just 2% per year (less than inflation) he’ll earn another 10% tax free.

But I've only seen three of those deals in 25 years.If you want to do park expansions, that's a different story, but even then your odds of getting the necessary permits are maybe 10% given the hostility of city government to affordable housing in general, and mobile home parks in particular.

With a tight labor market, low interest rates ,QE and an economy deep into one of the largest expansions in history we still see very little signs of inflation. 

You're going to find them selling all kinds of food in odd packaging that you wouldn't expect a chain of convenience stores with organized logistics to deal in.

Though I thought this was a bit odd, I put those terms in my lease.

You can find better odds in some areas than others, but there is never, ever a guarantee of appreciation.  

Sounds odd, but it works.