i just got approved with Phuket King Muay Thai - Course only cost 15k for 6 months training. Its the better option. Why take the chance of being rejected and losing 10k baht, then you are already potentially at -5k baht more and a lot of wasted time, than if you just signed up for muay thai. They were very efficient for me, once i applied they sent all the documents within a few hours
NEVER pay 2 months deposit, you won’t get it back, sign up for a year contract , say you have emergency back home but give a few weeks notice. Some landlords won’t mind as they get to pocket your deposit , also you should try find someone yourself maybe to take over the lease before you move