I made a reflow oven using a toaster oven I bought from a local store. I did a write up on it over at CNCzone located
HERE.
It cost a lot for the data logger, but maybe you can rent one or borrow one?
The oven was $35 USD, the PID was $79 USD, and the relay and heatsink was about $15 USD bought off ebay. You'll need a thermocouple as well, that was about another $10 USD and the 110v switches were another $7 USD from Radioshack. So, without data logger, you're looking at about $146.00 and it works great! If you get the same toaster oven, I can send you the file for the cutout for the front plate. You'll need a jigsaw with a metal blade to cut out the old front plate (where old knobs were).
Just don't toast your morning toast in it after you use it to solder something in it. That would be bad.