If you don't have a 70 yet then I recommend against getting someone to boost you unless they are also going to gear you out and pay your training costs. Otherwise you'll be 60, naked, broke, with no skills.
If you have RAF, questing will be nearly as fast -- faster after they fix boosting w/70 + RAF -- and you'll actually have some gold for training costs and basic gear on the way.

I just finished boosting 8 new characters to 60, and it costs me close to 1K gold per character to do all the training and getting some basic gear. I actually need to go and farm about 3K more to finish it off before I start in Outlands.