I had my gears, set up kits, lockers etc. sitting in boxes for a couple of years.....bought everything a little at a time as money allowed and when found for a good price (picked up a used front air locker for $250!)
I already had a press, bearing pullers, dial indicator, made my own set up bearings, picked up a real nice dial type inch pound torque wrench for cheap (Amazon.com

) and studied and read just about everything I could find.....I'd done a couple of Toyota and Ford 9"s but, they're prettty easy compared to Dana axles.
So, did the front gears and ARB on an axle sitting on stands....still quite a bit of work but, got it done, swapped out axles and sold my old one. Would have been a real bitch doing it in the vehicle, laying on my back in my driveway!
My rear D44, I did in my driveway, on a creeper....what a pain (literally)
Had the carrier in the housing (barely) for the last time (after several times getting the B/L and a pattern I was satisfied with) went to reach for my dead blow hammer (it's tight when preloaded correctly), my hand slipped and that chunk with ring gear and locker fell out, bounced off my chin and onto my chest.....I saw stars, cut my chin and was worried I would have to go to the emergency room (just lost my job and medical insurance).
My conclusion: now I know why they charge good money to do this stuff.
I'm a pretty decent wrench, always wanted to attempt this myself and couldn't afford to pay anyone now that I'd been laid off. Since I already had everything, I only spent money on gear lube and some brake cleaner
So, if after hearing my story you feel like giving it a shot....go for it it's a good learning experience but, if you just want it done....it's money well spent and a whole lot less painful
Oh yeah, running 4.88s with 33s and love it!
Hans