Not so fast
Yes, its cheap with a starting price of $4900. But that is for the 60HP version not the 90HP version. I believe if you wanted the 90HP version and 3 seater it would be close to $8k. At that price I would rather purchase a used Yamaha with 200+HP and under factory warranty. Theres tons of them with extended warranty around. I used to have a GP800 that was ~500lbs and it was fun for a while but lack of top speed made me get rid of it. The spark will top out at ~45mph. This will be fun for a while but as you are getting passed by rental jet skis the smile on your face might just disappear. I also hear that they are very unstable and tough to climb on once you fall off.
I'm partial to Yamaha (obviously, I'm not hiding that). I put a lot of hours on jet skis living in South Florida and riding to the Bahamas etc so reliability is key. We end up towing seadoos home every weekend due to electrical problems, bad exhaust couplers, or carbon seal leakage. These are issues their $14,000 jet skis face, I can only imagine what kind of quality went into a $5000 waverunner produced by BRP. I'm weary.