Just come with tourist visa, free visa exempt, then renew with that visa, until your married paper process done, before your last visa end, you can apply Immigration for Thai wife marriage visa, they need you to have Thai Bank bank under your name for 2 months, before you can apply it, 400,000 baht, no movement lower than that before you can apply marriage visa
Tell hotel to let's you photo it or send you photo Line of TM30, tell them immigration told hotel can get fine from immigration if they not do it and you can report immigration on them
Normally in Bangkok rental pratice and most be in Lease Agreement is if you leave before lease end, owner will seize both 2 months deposit, also you have to pay last bill of rental fee, water, electricity.
Police can record what you do and immigration police can involve as you register TM30 on owner property.
If possible, just settle with them when you can pay it back to them, may be later when you can be able, running away is not help