Arkroyal
Can't suggest any cheapo methods to do what you want but, if the experience is of any use, I have both an Epson 1220(?) scanner (which comes with transparency adaptor as standard) and a Minolta Dimage Dual Scan dedicated transparency scanner. Unsurprisingly, the results reflect the respective prices. The Epson does an adequate job for providing standard postcard-ish sized prints - probably equivalent to a 1Mpixel digi camera. I have just used the Minolta for the first time on some Canon 35mm SLR negs and the results are stunning (as are the file sizes - typically 14-18 Mbs!!) The amount of detail recoverable, given the size of the source, is quite remarkable.