: off topic posts removed :
What is the average start-up cost?
You can check through some of the suppliers that we have listed as sponsors in our left hand navigation menu (bestblanks, imprintables.com, coastal business, etc) to get an idea of the equipment costs.
You would probably need a heat press, transfer paper, an epson printer at the very least. Maybe a vinyl/optical cutter, and some vinyl sheets if you want to do vinyl 1-3 color transfers.
If noone is doing it in your area, it sounds like a great opportunity. Especially if you already saw it work well for a person in a similar market (just a different region).
Once you have your business plan down and figure out whether or not it's for you, I say "go for it!"
We're here to help if you have questions along the way.