I would sell everything I can, plenty of websites for nearly new stuff. Then by new in Thailand (full warranty) the money you make and the cost of postage and other fees, I would say not much in the difference
Your better off spending an extra bit for better connecting flights, if you have a few pints and some food over 6 hours out and 4 hours back or so, you will be spending roughly the same price.
60 day single tourist visa, which allows you to extend a further 30 days at immigration office. All online at the moment, so you will get full information there
from whats out there, you need a professional antigen test before flying, but this is likely to change as it seems thai immigration want the airlines to do them, time will tell on that as this 300 baht entrance fee is bogged down with the airlines saying its to hard to operate 🤔🤔