@Nicholas DillonRentometer can give you a rangeZillow also can give a rangeThe best source would be to call a loc a property manager or realtor and have them also give you a range as at end of day they will have most recent and updated numbers and have a better feel for where the market is at

By exploring options for cost-effective utility usage, such as installing low-flow fixtures and implementing irrigation systems, we can significantly save on water expenses.To keep things running like a well-oiled machine, you’ve got to have a rock-solid asset management plan.

The fact that she is elderly and living alone does make me pause and consider what other options there may be which is what brings me here.

.- Art/Decor:  We have sourced local art from farmer's markets and the like.  

That really isn't good enough in our opinion.Another option for you is if your property is in a realtively safe area, to install a wi-fi connected smart lock.

Your post about summarizes what I figured my best options are. 

Cash for keys is a good option but it depends how much they owe.

Always consider the source.

With the newer 5% down conventional loan for owner-occupied multifamily option, I generally advise people to start analyzing from there if they want to house hack a multifamily with minimal down.  

And the really messed up ones, they don't even give a landlord an option, per fine print in contract, they just go out and do whatever and send a bill after the fact.