Grabbed this cart from Harbor Freight. $60 isn't too bad. Everything fits perfectly and it'll hold up to 450lb. Can mount my plate chiller right on the side and add a pump when I get one.Steel Service Cart - 24" x 36"
Get a heat shield between the burner and cooler. I have almost 1' between mine and it gets toasty hot, yours is likely to melt.
What material are you using?