how easy is it to do the eibach coil and shock replacement in the rear? Can I do it with hand tools? Do I need to take the wheels off? Do I need to realign the back wheels? I'm thinking of doing whatever I can myself. I don't have **** for tools.

 

Very easy shouldn't take you more than 2 hours.
You remove three 16mm nuts then you'll also need torx bits or allen keys with a 17mm wrench in order to get the nut off the strut housing.
All in all very easy install.
Here's a quick list
-Jack
-Jack stands
-Ratchet
-Torque wrench
-16mm socket
-17mm wrench
-Allen keys or Torx bits
Good luck