I tell her she should get a contract, which my mother tells me she can go to Walmart and get a contract and that will settle that, and my relative left his entire home furnished, so imo that makes more sense to air bnb but I’m not expert  I’m wondering are there anything to look out for or avoid a migraine with?

If they're unwilling or unable to do so, take that task on yourself.Assuming you can clear the air, let them continue doing what they've done well for you in the past - property management.

If not, then ask that the boxes go in the middle of the room, so that the inspector has access to the walls (also if there is an active leak, the last thing you want is a bunch of cardboard boxes against the wall impeding air flow).An inspector will not move anything for the inspection and they will miss things because nothing is 100% no matter who does it. 

In parts of Chicago, not having central air or W/D in unit can still be a good deal and a "turn key" property for that neighborhood.

Found through agent after 8 months of searching while doing Air Force pilot training duties "on the side" xD.

Have you gotten insurance similar to Air Cover for issues that may arise?

You can get something like Netflix, Roku, or over-the-air antenna which gives them local TV channels but your cost is very low.

It's one thing if you want to screw over someone , steal $10K and disappear into thin air.

And anything within a block or so of the ocean is going to take an incredible beating from the winter weather salt air etc etc.. and then you have the Tsunami that is coming with teh massive earth quake that will come and that will wipe out whole towns on the Oregon coasts.

If such is the case, the tenants in the lower flat will hear the tenants in the upper flat walking around, and kids running around upstairs can amp up that noise.If the flats have a common forced air furnace (or if there are two furnaces in a common basement or attic), muted conversations will make their way between the units.