That's crazy documents. I applied online in the US, I went through soft power and only had a medical certificate letter stating I had a follow up appointment.
definitely take LOTS of photos of all the small details. Create a LINE app chat and share the photos with the landlord / agent. Things like stains on the walls, scratches on the floor (if wooden), dents and dings on the doors. Some things you won't notice until you finally move in, keep sending these to the chat so both parties have a time stamp of shared photos.
Ask when the AC was last cleaned, if it's a year lease then it should have been cleaned before you move in.
Also (and I haven't tried this yet) it could be good to ask the landlord how much of the deposit they returned back to their last renter and what it was related to. Just getting whatever answer they give back to you should clue in as to how honest they might be.
well technically i've done lots of visits to TH by air back to back with a week or two in between, and got told I should get a tourist visa "next time". So I wouldn't say its guaranteed to be 'no limit' for entries by air. I suppose you can do it until told otherwise.