if you are on a cheap beer budget, get a used SAFC, datalogger cable and palm. Probably around $300. Software is free.
For a bit more, a MAFT setup and datalogger/cable/Palm. Or if you have a laptop already, scratch the Palm. But budget $200 US for the MAFT and about $50 for the GM MAF, used. With logger stuff, still under $400.
If you have a more moderate budget, but still have constraints, get DSMLink and an Eprom ECU. Probably just over $1000. Still very easy to use and you get much more than the first two options.
If you have lots of money(but by your post you don't) get an EMS or other standalone. Great stuff. More money of course, but probably best. You will also need some time to learn it. And you might have to pay for some of that time, possibly?