Aesthetics is it worth it?

Just interested in starting a business for botox injections in Canada. Just wondering if anyone has had success with their business? And how difficult is it to get clientel? Training is expensive for a couple of days, SO... IS IT WORTH IT!?
Got a job lined up working for a plastic surgeon in her clinic and plan to use my skills there, or branch out into a business using her as a subcontract signing off charts. Sounds like a good idea. Any tips on how to get started?