You might be here already. There's a point of diminishing returns when saving money on rent. You can pay 4500 baht per month to stay in a dump, or 6k for a more modern room in a condo like Novanna Residence:
https://propertyhub.in.th/en/listings/novana-residence-studio-for-rent--9894089c---3699516
It's better to rent a nicer room and stay home for a night or two per month than to stay in a dump, and yes, the places you listed are dumps.
When you're retired and willing to sign a long term lease offer to pre pay for a year and ask for a discount. Some condos sit empty for months at a time and the owners are better off giving a discount than getting zero rent at all.