Renting out rack space guarantees revenue, while mining put yourself at risk. Then again, no one is going to entrust their miners in your possession. Find a partner and co-mine is possibly most practical.
not sure why you think no one would trust someone else with their miners... there are a number of hosted mining companies around this town that seem to be doing well. just because you are paranoid and do not trust people, does not mean you speak for the whole.