I agree with Steve on having a plan. This is very important. As far as waiting or not waiting, you are taking on risk no matter how the market is doing. Rich or poor, people will always get tats.
If you have a strong reputation and are networked well, then you have a great start.
sba.gov can be a resource for starting out. Make sure you meet the local regulations for operating a tattoo shop. A lot of times you won't get caught until a competitor or ****** of customer turns you in. That could kill it quick.
My wife ran her own massage therapist business for 3 years. It is hard. She could still have it but she did not want to manage staff and found it more profitable to work for an established corp.
I wish you the best.