Ive been wakeskating for about a year and im looking to back over to wakeboarding for a while i just need to know if a tower is vital to do tricks or is just to aid?

its not "vital" alot of people probally started without one...LOL i started when i was 14 on a 144cm behind a bass boat, but to answer your ? it is possibly to do inverts without a tower, i have seen my friend josh do a few backrolls and tannys behind a bayliner! BUT.....its a HUGE PLUS To have one! you wont regret it