Here's advice from a guy that wanted to pay 90k for boost, but gave up on that and did it alone. You should definitely watch a guide or two it would help a lot (it's A MUST if you are a tank, and melee (optional) because cms are extremely melee unfriendly), you can get away without knowing tactics as a range dps (I was one). I recommend you use OQUEUE because that's how I've done it, it's required that you arm yourself with a decent amount of patience. Skype is always recommended because if u don't know tactics someone who does can fill you in very fast without looking at any guides (I've myself have done half of Cms without watching any guide), if you are ranged dps then it's the easiest for you (if you don't know what to do just follow someone who has similar role to yours and stand where he stand and do what he does, for example if you are warlock you should follow a mage or boomking etc.)
At the end it's a nice experience and a lot of fun, you will meet a bunch of new ppl as well, because the odds are that if you have done 1 cm you will do another one as well. And if by any chance you are in struggle with time (because of new xpac coming) and you need 2 or 3 cms left to complete achiv, your boost price will significantly decrease. I suggest you giving it a try yourself and see how it works for you.