Anyone lay their own concrete?

Are you doing footings? I am unsure of practices in your area, but I feel most construction I have witnessed has footings. So trench, trench in electrical and plumbing, form footings, hang rebar to code, pour footings, lay drain pipe, maybe break up slab into sections and put in drains in the floor of shop so you have places to slope to, then run a lazer around footings 6" down from top of footing and slope to drains. I would make a couple of well placed 6" parts where you can bolt a lift to. Also keep in mind bolting building to foundation which would require putting in 'J' bolts every 8' or so......

But, not sure what you are looking for.....