Beyond the manuevers you mentioned, think of the space inside the asteroid that can be used to house people and facilities.
Check out 2312 by Kim Stanley Robinson. In that novel, asteroids are turned into solar system cruising space ships.
I idled in the chat box for a while, the paypal emails said it was all good to go, but like i just posted below, I used another vendor and it's all good. $2 more than I wanted to spend but I can't complain. I'm doing my best to bring the amount linux folk spent on the bundle to the windows level.