Off the top of my head I can think of a specialty truck tire place, an auto inspection business, and a lawn mower/small machine repair business.As far as determining price, there's the old standby Loopnet.

If you meant more like what vehicle, I'm going to focus first on low end fix and flips and maybe do a house hack too.

The Reit or whatever investment vehicle that part does not matter as the principle is the same regardless.

Rent out your current house and invest that money by paying down the mortgage of the rental house or finding a new investment vehicle for your future.  

@Jeff Thompsonwhen you sell investment owned by the IRA - the gains are sheltered from taxes (because IRA is tax-deferred vehicle) and when IRA-owned investment produce income or cash-flow - it must flow into the IRA and also will be sheltered from taxes (unless the income is unrelated business taxable income). 

General Public - I'm tired of you thinking we are obsolete, someone has to be accountable for showing property and responsible if something happens.

Everyone get concierge service...check cashing, flat tires fixed, trip to and from a dentist, loan-a-tool, jump start a dead battery, etc. 

In other words you need to find a seller that's just tired of owning a property.  

I'm tired of chasing a "9 to 5" job and I no longer want to make excuses, but to come up with creative solutions.

There are dozens of "mom & pop" MFH owners out there that are aging and tired of owning their properties and have considered selling in the back of their mind.