Not sure 101K was closed, perhaps you did not go to their last location which is (was ?) soi Latphrao 101 - Latphrao 101 soi 8 corner.
However I just come across an insert on a Facebook account dealing with massage places sales : the business is now on sale for 410,000 THB (rent 20,000). Detailed list of equipment provides some information about what is needed for operating a massage shop (although the boys are not listed). Translation by Google :
Massage shop for sale in Soi Ladprao 101, at the entrance of Soi 8, next to the main road, next to MRT Ladprao 101, 4 and a half story building, renovated, very beautiful and new. Rent 20,000 baht, contract renewed every 3 years, owner is very kind. ✅Sale price 410,000 baht✅ including 40,000 baht deposit. Items included✅ (1) 10 air conditioners ✅(2) 7 water heaters ✅(3) TV ✅(4) Washing machine ✅(5) 7 high-quality hotel massage beds ✅(6) Counter ✅(7) Sofa + coffee table ✅(8) Water pump ✅(9) Rooftop water tank ✅(10) 7 massage rooms, all VIP rooms with en-suite bathrooms ✅ (11) 2 staff rooms with air conditioners ✅(12) Rooftop can be used to make more rooms with air conditioners ✅(13) Long illuminated shop sign in front of the shop, beautiful ✅(14) Illuminated shop sign outside the shop ✅(15) 3 fire extinguishers ✅(16) Sound system and speakers in every massage room. ✅Parking available for 1 car behind the shop and in the market. ✅More than worth it! ✅Just bring your bags and you can continue operating. ✅Everything is included. 🥳Interested, please contact me ✅0991455768 Krit