Real estate would be classified as a product you bought, marked up and sold - no tax advantages apply.

Look on Craigslist, local rental website, or local classified ads and try to find something similar.

You can also get on buyers lists for Wholesalers, just specify what you want and know your numbers before you sign anything :) You should also call all of the "For Rent" signs and classifieds you see in yards, KSL and Craigslist.

A building built in 1978 would likely be classified closer to a "C".  

I have to classify whether the trips back and forth are business or not.

However, you may be able to sell your % to the other investors as one sale and go forward with a 1031... if the corporate structure can handle it appropriately, if you can say/demonstrate that your intent when you went into the deal was to hold the property for productive use and now that the groups direction has changed you are selling your portion to purchase other property to be held for investment.And if the improvements to the property would not cross the threshhold of "creating inventory" and could be classified as ensuring best and highest use.  

@Donna I have 2 methods. 1 I went through local classified ads and looked up keywords like we buy houses,sell house fast,I buy houses etc..

Or whether it would classify as improvement to the house, as oil tanks are part of the heating system.  

I'm asking these questions about allowable mileage because each trip needs to be classified, so I want to know the classification rules. 

There is also the wholesale marketplace.The web/online marketing person in me would love to develop a crowdfunding or classifieds website just for local (Denver only) investment property listings.