I had a renter that rearranged all the furniture, left everything absolutely filthy, grease spilled all over the counters and oven, food spilled on the floors and table, trash left everywhere, etc.

There are many horror stories on collecting for damages from OTAs including a current thread on BP where guest left doors and windows open upon exit that resulted in frozen pipes.  

Computers can analyze property based on subjective data (square footage, # of beds/baths, etc.) but cannot calculate for objective data (quality of kitchen cabinets/counters, size of bedrooms and bathrooms, view out the living room window, etc.).You should study the market yourself.

I don't think any water is coming into the crawlspace other than the plumbing leaks in pipes running under the house.   

So you don’t end up being the cause of frozen pipes.

Put language in your lease about use of the screen for all fires.I always made it the tenant's responsibility to have the chimney cleaned at least once per year for the built in fireplaces and twice per year for the store bought types as they have smaller chimney piping.  

Prince Georges county in MD also offers over the counter liens.

I have a client in Reno doing two reverse 1031 exchanges and we've been able to secure some great deals putting out some cash offers (both weren't even countered). 

This sounds like it might be a pipe dream based on everything I'm reading about restrictions directly in St.

In the northeast having a second heat source in the rental saved  frozen pipes when the electric was out for days.