My fat a$$

I try to be good and workout, and look what my huge a$$ does to my elliptical trainer!!!!!

LOL its a cheap machine that I bought a few years ago, but how great is that?? Any ideas as to what I can do for a workout now? I'm not about to drop 1000 on a new elliptical b/c FH will bring his when he moves in next year, but under my rug is concrete so I need something that wont kill my knees! Please help!!!