“How to proceed with decent liquidity?”.

The title company gets paid when you buy. 

Starting out as an investor/wholesaler we all know there are investor friendly title companies that will help with double closings, assignments of contracts, and blind HUDs.... drop them in the comments. 

I've had great tenants in bad areas and bad tenants in decent areas in the past. 

I started doing that on my properties years ago when I had an incident when a mortgage company did not pay my property taxes, even though I was paying through escrow, and I had to make the payment myself and fight to get it back to me later to avoid a tax lien on a property.

Property management(company). 

.- Manufacturing Companies: The City-Data forum post lists several major manufacturing employers in Cookeville, such as Fleetguard, Ficosa, and Tenneco.

It is no different than a loan company requiring insurance on your house or car.As @Dawn Brenengen said, require that they put you down as additional insured.

If you’re going to try to keep repairing units instead of replacing them maybe switch to an appliance repair company that comes out with the parts? 

It's in Spokane, WA and in a decent neighborhood.