Outside the likely once in a life time subprime loan crash real estate has had steady growth over the last 30 years with a very slight reduction in 1991. 

Low to no cash flow today with prospects of heavy depreciation & potential rent reduction is a scary thing.Where are you currently looking for property?

Hi, the fence blew over at my rental house (see picture) and the tenant is offering to replace the whole fence in exchange for a permanent 5% reduction in monthly rent.

Personally I like the idea of having a few properties owned outright , simply for safety / risk reduction to keep the wheels turning in tough times and there will always be tough times or massive expenses if your in this game long enough .

A positive cashflowing property can easily be 3x the ROI of an index fund even with your suggested % reductions on the simple ROI calculation.

Chances are, however, that tenants will only agree to it if it benefits them (reduction in rent, extension of the lease term at the same rent, etc.).

Because of the added weight can cause the roof to buckle or fall.  

At the very least, he/she would likely be willing to pull a CMA for you, but keep in mind that it's likely weighted to your advantage.

The addresses in previous years were heavily weighted to lower value properties, probably reflecting subprime loans.  

So I'd suggest that you put some weight on and grow out some facial and/or body hair.