A rowing machine, duh! Why didn't I think of that?

I'm pretty sure they have a rowing machine at the gym. I also have a Pilates tape that I've been meaning to try, but I've been neglecting it in favor of aerobics to try to build up some endurance first for a race in two months. Maybe I should alternate a day of rowing with a day of Pilates while I'm on this job.
The custom shoes sound wonderful, but they'll have to wait till I find a job that pays decently. After this assigment ends, I'll be telling the temp agency that I can't accept any more of this type of work, at least not till I lose more weight. I'm not sacrificing my feet for minimum wage.
Thanks for the ideas, Kykaree and Firmgirl!