also, how do I figure what type of counter tops,flooring,tiles, waterless tanks, etc, are better vs others as far as price and quality.  

Forget commercial.170k down is not enough to own a quality NNN asset outright.

First, you need to speak with your landlord/tenant attorney about the exact process and timeline in your state. 

Ask to speak with some of their current owners and current/former tenants.

Best price for the quality of work he does.

Generally speaking if you have 6 months reserves to cover all property expenses, you should be fine.

All of them are pretty similar in regards to price point, tenant quality & rental yield etc.....

There are a few properties that come and go, primarily duplex and triplex properties of not great quality in not great areas that fit the bill, otherwise the mainstay seems to be something like: 3 Bed 2 Bath home, 900-1200sq ft, built in 1930s, needs some work, 120-160k.

If you want help from a specific agent to find a buyer for your deal just call a local office and ask to speak with an agent that represents many investors.

*****************************************************************************Here are a few things to think about:- The headline is speaking about income, sounds like profit, but is actually revenue.