On the few times I tried doing this, I had very little luck. We have a local embroidery shop that has one of the big presses like you see in t-shirt shops where they put various decals on the shirts. The shop owner graciously pressed my printouts on the t-shirts for a small fee - I think it was about $1/shirt. Well worth it. Those particular shirts' decals have lasted for decades through some really hard wear and washings. Perhaps you have something like that near to you that might be worth your while?
My only other suggestion would be to try to pick up a vintage dry iron at a yard sale. Those things seem to get really hot.