From random stack exchange nonsense: 750Hz-ish? Idk would be nice to run some actual fluid dynamics on, you'd probably run into issues with that pesky sound barrier...

But in all seriousness a paramotor is relatively cheap ($10-15k ish depending on how much you spend on a training program). I've only flown fixed-wing since I got financial aid for lessons (there are a TON of scholarships out there if you're serious about flying, there's a huge pilot shortage right now).