Some stuff I’d likely be ok.

And the old adage is to get them in an LLC (LLC Series / which complicates leases and stuff) is not necessary. 

What is the best thing to do with all the stuff?

Check the utilities have been moved out of her name and if they have, she left the key, you have it in writing that she wanted to leave and all of her stuff is gone, then I'd say go in and start getting it ready for the next tenant.

I'm going to get some stuff from Goodwill and Walmart this week to dress up the room and put artwork on the wall. 

Wordpress has a lot of widgets and plugins for STR stuff.

Ring doorbell or similar camera to check on who comes in and out, and smart thermostat so you can change the temp before guests arrive or when they leave.

I could review the stuff for the day or week and adjust the categories then if needed.I used a single CC for supplies, and a single checking account for all labor. providing the ability to match back expenses without having to check a bunch of different accounts.You could do this with different cards for each project, and a labor bank account for each project.

texture looks weird. looks cheap, looks like florida houses looked 30 yrs ago and most of them still have that stuff on the walls.it hides imperfections, but i dont like the looks of it.

Great stuff @Noe Gil!!