I could understand your frustration. It sucks when a few separate problems rear their ugly heads.Well, it wouldn't RPM last time I drove it. Checked the plugs, replaced the wires, suspected exhaust obstruction, so I removed it. Then, I noticed that the lovely 2 year old CCC Dualjet was no longer making any noise like it usually does. Soooo, I parked it to build a non CCC Dualjet for it (and install a non-computer HEI). Then kid's graduation and summer happened. Today I noticed that there was a nice dark spot under it, and it wouldn't even think about going to reverse, so I guess the trans is going to need some loving too.
I swear, some days I'd sell them all and buy something that runs and drives and doesn't need everything just to be out from under it all.
Good luck with it. I hope you find a viable solution that won't break the bank.