How about selling broken-down cars to homeless people so they have a place to live?

............JUHHHSsst kidding!!! :-D
One idea would be to put together a sort of quick business outline. Not
really a business plan, but set down on paper two different "scenarios."
For example, you know it`ll take X amount of time to get a real estate
license. Then it`ll take Y amount of time and money to build a
clientele and business. Additionally we`re enering into what many
people suggest is a bit of a slump.
On the other hand, what would you do with cars? Are you thinking
repairs, sales, dealership, antiques, customizing? How long would it
take, and what would be your investment.
As you work on these two scenarios, putting actual milestones, costs,
and income projections, you`re going to "tighten up" your thinking.
You`ll begin to use your imagination in a specific area, and I`d bet
you`ll start to get some interesting inspirations as to how you might
combine the two.
Just off the top of my head, you might end up as a real-estate broker
who specializes in finding locations for entrepreneurial auto
mechanics. With enough money from the brokerage, you could also become
a partial investor in some of these businesses, and so forth. There`s
gotta be lots of other ways to join these two interests....so if you`re
thinking and writing, planning and projecting, I`m guessing some of
those ideas will come to you. :-)