Well...figure on average give or take...5 bucks a quart and you need 8 quarts to do a pan drop. There's 40 bucks...and a transmission filter/gasket are around 10-15 bucks...so there's 60-ish after tax. Do you have a bucket to drain it into? A funnel to fill it back up with?
I'd save your money...work some more hours...and just drive it.
When you get a better paying job, hop on the mod train. I was in your spot when I was younger...gotta weed through all the crap for awhile.