Technical Hand Hem tools

I race a dirt late model and am starting to do
more of my own sheetmetal work. I've got an 8' brake and some other basic tools. I really want a Mittler brothers bead roller.... But I don't think I can justify it sadly. This is all .040 aluminum. No steel. Has anybody used or seen the Wuko mini bender? Looks like a nifty tool for just hemming the wheel arches etc. pretty pricey for what it is though. I have 0 use in a hand crank bead roller. It's impossible to hold a quarter panel or 7' door and crank de' crank. I'm usually a one man band in the shop. Thanks for any advice.