The owner warned me it may be squatter occupied, and I went to look at it myself, it bad clothes hanging and 2 locked doors that I assume someone was living in.

You could put shelves with cloth bins on the wall to substitute.

Everything Paige said and a few more.All vehicles must be licensed, tabbed and operableNo water beds, pools, portable heaters, portable dishwashers, portable clothes washers or dryers shall be used on the premises without prior written consent of agent/owner.No dust, sand, dirt, rubbish, coffee grounds, feminine products or other foreign material shall be flushed or washed down toilets,sinks, or wash basins.

Otherwise, anything with a wet cloth pad will get dirt and oil stuck in the pad, which then gets spread throughout your floors as you mop.

Hanging a large picture or something at the head of the bed usually looks nice.Additional Bedrooms:Any additional bedrooms, I stage either as an office with a writing desk and computer chair, a workout room (yoga mat and pretty exercise accessories), or a nursery with a neutral white or wood toddler bed and a changing table. 

Beware of bedbugs getting on your clothes and you transferring them back to your own home- if you wear a haz mat type suit the renters will feel like something is wrong and feel very uncomfortable- but in some heavily infested situations it might be called for.

bondo glass" (also polyester resin, talc with fiberglass cloth strands) & similar is the "lowest" group of products I would even remotely consider for exterior/occasional water exposure.

In some spots, we work some places like sponsor themselves as private yoga teachers, or private chefs, etc., and it helps our str get a lot of business and a lot of those folks recommend our STRs. 

They don't want to pay for insurance when they're only bringing some clothes and toiletries.

Clothes are to cover the body.