How can I successfully run a housekeeping business?

I'm in college, now, and fall semester I'll be living in apartments. I was considering many jobs, but due to the fact that I'm an introvert, I feel like any job involving me and many people would mean failure.

I considered housekeeping, since it would fit me perfectly - I have no problem cleaning (especially if I'm blasting music on my iPod), there are many big houses/mansions near my university, and usually there aren't people I have to interact with, and if there are, it's not constant.

The only drawbacks are that the classes at the university do not run past 6pm and those who do usually start at 4pm because they're labs that run for hours. I am aware that the best time to clean houses is in the morning, which I can't do since I have classes. Also, due to the fact that I'm a male, I'm sure there's a lower probability of me getting hired to do housekeeping.

My mom, who also needs a job, also considered being part of the business. I was thinking, thus, that I could run the business by getting a hold of houses, getting materials needed, and so forth. When I do have time, I would like to clean houses as well. My mom was thinking of being in charge of the cleaning, along with my sister, to help me pay for college and living, and to help herself as well.

So, what I think I'm asking are the following points:

1. What capital would I need to start something like this? What tools will I need?

2. What kind of housekeeping etiquette should I keep in mind?

3. What are some good cleaning methods I can learn, or where can I learn those methods?

4. What are the best ways to market/solicit to houses and how can I know which kinds of places would have people who are willing to pay for these services?