You have to plan a rigid job out way far ahead. Most guys who run rigid absolutely hate to use 3 piece or threadless fittings. Even when I have no choice, it makes me feel as though I've lost some sort of a battle.
I was working on a full-unit addition to a power plant a number of years ago which included a new steam t/g, boiler, 15&5KV switch gear line ups and balance of plant systems. The electrical contractor was excellent and the local guys were all incredible. I used to go out with several of them on Thursday's for beer and darts and I found out that they had a contest each week to see who could use the fewest 3-piece couplings (comps were not allowed by spec. on this job). Whoever had the most had to pay the tab. You'd see these guys hoisting up this 400ft. long, fully-assembled run of 3" with all the fittings in there and you'd know why! (the tabs were NEVER trivial!).
After a few months, the contest got pretty boring since it was usually a 9-way tie at 0 Ericsons per electrician.
At any rate, Micro, I know what you mean. To these guys, it was a sin to use a 3-pc.
Well, now, there's what's right and what's right and never the twain shall meet.
Wait till you see the wire prices. The fittings and conduit will look like chump change.
Check the supply houses for wire. Sometimes you can get it at a much lower price than HD or Lowes. Graybar sells wire at the going rate for copper that day/week, where hd and lowes has a set price with no regard for market price.