I think you could "rent" them from places like autozone. You give a credit card number for security and if you don't return the commpressor they charge you. If you return them there is no charge.

 

I bought one like the second when I was going from my 2.5" to 4" lift. Thought I'd need it.

Didn't need it and didn't use it.... Disconnected shocks, trackbar, and sway bar links and the 4" lift coils slid in easily. Later added a 1" spacer in the rear (to make 5" total) since my 4" was sagging due to bumper and tire. Again, no compressor needed.

 

Thanks for all the input everybody.
I stopped and got some compressors, but I will try to do my work without them. Want to have them on standby just in case I need that extra help.