Pat, I agree with Brian, send it to a Data Recovery specialist. If you use free software or even purchased software you could lose it all permanently.

If you need the files but can't afford to have the pro's do it now, pull the hard drive and set aside until you can afford it. I would to a search on data recovery companies, check out the closest ones so you don't have to ship it or ship it too far, and get their prices. Then decide who and when to do it.

I've used file recover software in the past with about a 50% recovery effort. Sometimes it works very well and other times it's been total failure.