i didnt read every post
but once you get the brackets and bags, run the lines to your bumper to a shrader valvle. air up the bags with a shop compressor to the correct ride height.
or you could make a 2nd shock mount and just run pins with clips like on a trailer hitch to connect them and run air shocks. that would be your cheapest route and would get the job done, 2 shocks, couple feet of line, and shock mounts