It seems that by you asking the question that you want more confidence that your making the right decision before you go head first all in.
I had a gym once and before I bought it one of the previous owners told me that I had the skills to make it work, and I did 🙂
So my advice is to talk to someone who was and or is successful to see if they think you have what it takes to “Make money making people happy” as I put it.
Look up Jim Thomas and Curtis Mock on Google. They are consultants in the business and usually you get an hour or half an hour free. After that they may seem expensive but if you feel you need to hire them then do it. You will get far better quality of advice from these guys than anyone else maybe other than Thomas Plummer who is $300 an hour. I paid a consultant $2,000 a month for the first 6 months for consultation and it was well worth it.