Woodpecker v3 is stable can hold over 3k Users.
If you don't want to used WoodPecker v3 then i suggest using Bloodline v3, Its Ok.. But has a couple of bugs with certain stuff. I wouldn't plan on hosting this server with a VPS As it crashes on a certain amount of time it's been online.
Here's a couple of V18 Hotels if your intrested
If your wanting to go on a v18 Retro then go to
BlabbersHotel - kickin' it old skool
It's only 24/7 And if its offline it will land you straight to maintenance page. Also the owner has very poor management with editing the basic values of the hotel & Staff Management. So not alot of people are online at certain time.
The Best v18 would be
HabboDavinci ~ 2007-2013 © It's spanish but it's the Best Hotel Around. Check it out.