Essentially the Moki set-up is identical to the smaller glow counter-parts. You can run a regulator system on it for a bit better reliability sometimes. That's usually used where tank placement is several inches away from the engine. Which in an aerobatic plane is likely, this is place tank on the CG.
The Mokis are fuel hungry, and will use about 2oz's a minute, so there's going to be some cost there. I use straight methanol in my 1.80, and mix my oil(BlendZall) and it costs about $6 a gallon give or take, depending on where I get my methanol. I did use FAI fuel at about $14 a gallon, and someone in my club shared this info with me, and I tried it, and it runs excellent, and clean.
You really don't need an on-board glow at all. It's extra weight, and the Mokis are very reliable. Mine will hand-start(back-flipping) with no prob, using a chicken stick. I just get it very wet, and give a firm back flip, and she'll usually fire after 4or5 flips. Ignitions do not exist on these, being of the glow variety(unless your talking about a different engine), so to kill it, it's same as smaller glows, just close throttle throat, and it dies...that simple.
Really not alot of difference then smaller engines though, once you get over the intimidation factor, that is if you have any intimidations. I did, and just took my time with it, and didn't let ANYONE hurry me. Run it in your time frame, get to know it, and the Moki is a very nice(one of the nicest glow) engine. There are a few back-plate mounts available, and several beam mounts that will do the job nicely. I've ran mine in a Goldberg Sukhoi and am now installing it in a H9 Edge(this is a 1.80). So they are very well suited for aerobatics.
Gas is like they all said though...very cool too, I also own a BME50, so kind of have the best of both worlds. Although to get a gas engine the upfront fees will run around $600-650 including muffler/ign battery, compared to the Moki at a bit over $300-350 including muff. Mokis are good engines though...the best in thier class. You might look here in the swap-shop and see what there is for sale too, sometimes you can find them for a bit less, same for gas, but not as common as the Moki I don't think. Good luck,,,what ever engine you choose your in for a treat with that plane though.