I don't think it's that expensive if you get it used, but if you're asking for a dollar amount, I couldn't tell you. I used to work for a company that did screenprinting on buckets and jugs. If you need some for just t-shirts, that equipment would be much cheaper than what I used. I guess you'd just have to browse around. But yeah, you'll definitely be investing several hundred bucks (minimum) into a project like that. I'd personally have a design ready for a screenprinting company to do it for me. More efficient in my opinion.