Its not really expensive I have a quote for a 20 man TS3 server for $10 USD which includes 4 slotSCALE so incase we get full, we can expand to hold 4 additional players. This is for 3 month prepaid.
If after that we need to get a bigger voice server we can, and i can setup paypal for it if any members wanna donate a 1. If each member donated a 1 i could prepay for a year then.
Right now i'm considering just prepaying for 3 months.. try it out and see if we like and it and its useful.
~Ven