I have been studying this for a long time, and at the verge of ordering a DIY inground kit for a 20x40 with a 1200 sq ft deck. Will need at 75-100 yds stone (northern climate, need lots of stone under deck and yard slopes down about 2'). How hard is this and how difficult of a project? Here are my estimates, wife thinks I am crazy. Hire out excavator, electrician, finish concrete & vermiculite, gas line. $35 K DIY, $50K by full builder. Tasks below by me. Some but not a lot of help available. 1 day set up & level panels; 1 day string lines, level walls & finish grade floor by hand; 1 day pour collar, 1 day install skimmers, lights, plumbing, & test; 1 day install liner; 1 day backfill pool wall overdig 30 yds stone & fill pool from water trucks; 1 day building 2 foot high block retaining wall one side of pool patio; 2 days moving 50 yds stone ( w/ bobcat) to deck area & vibrating stone; 1 day bonding rebar, setting up diving board, pool ladder, preparing for concrete pour; 1 day final equipment set up on pad & connections; 2 days installing aluminum pool fence, need 34 piers drilled 48" deep with rented bobcat post hole digger. Total about 14 days of work full time.

What are the hardest tasks? Are my estimates accurate?