I wired My Garage For Wall Charger

I've alway been a do-it-yourself person long before it was cool to repair thing around the home. Long ago I bought a Reader's Digest home repair book that tells how to wire, plumb=it is the yellow book.
Anyway, that was the book that taught me how to wire for various things from r120V receptacles to 220V dryer receptacles.
I bought the Chargepoint 220V wall charger off of Ebay for $336.00 and then in the heat of summer decided that I absolutely had to wire it up. I had some 8 Ga wire (multiple strand stuff) and found that I needed more so I checked Lowes and Home Depot and Ebay again and found that Ebay had the best prices on that wire with free shipping so why not? I received the wire in a couple of days and began the wiring process. I read where one needs a GFI 220V breaker but the Chargepoint instructions say no so I bought a cheaper non-GFI breaker for my 200 Amp breaker box. Ran the wires down the flex tube to the breaker and left it at that until I did the remainder of wiring across the garage and down the wall about 4 feet from the ceiling. That made it a little easier since I didn't have to pull the wires though all the insulation.
Ran the wires with little problems since the builder had already drilled a hole for wiring through the top plate. The problem was that the wires are fairly large in diameter and I couldn't run all three at the same time so I ran one and tied a nylon string on it, pulled it back up in the attic and taped the other two wires on the first wire and pulled it through to the hole that I'd cut for the receptacle. I wired the receptacle, put on the plate and then went back tot he breaker box to wire the 40 Amp breaker. Viola!, the Chargepoint lit up and I could now charge the car in a couple of hours vs 4-6 with the 120V cord that came with the Prius Prime.
Later I went up after a cool spell weather-wise and pulled the wires out and ran them through electrical PVC 3/4" X 10' tubing, clamped the tubing down with both plumber's tape and hooks that I'd purchased at Lowes.
After all is said and done, it's nice to be able to charge the Prius in 2-3 hours but not necessary since I'm retired and don't make several trips per day, maybe 2-3 trips less than 10 miles per week so maybe I should have stuck to the 120V charger?? I'd make more sense in retrospect since there was probably close to $425-475 on wiring, breaker etc and the charging unit. Worse, the heat int he attic was relentlessly oppressive and dangerous to someone 74 years old. So it could have even been more costly-Ambulance, ER etc...or worse.