For that kind of money, get yourself a piece of plywood (usually cut free at the home supply) big enough to fit on top of one of those $40 fold-up WalMart tables. Then, invest in a set of 3/5/8" risers (again from WM) and get the height and sturdiness you want.
Line ironing side of the board with aluminum foil and start with your batting layers (over the edge too), cover, and you're on your way.
I sew apparel as well and simply use (make my own) dressmaker's ham and/or padded tubes for those curved seams and smaller areas that need a special pressing during construction.
All in all, by the time you pay the $70-odd bucks, tax and shipping (or gas to get it), you're coming out about the same and you'll be lots, lots happier with the bigger set-up.