In my main business it is our biggest driver of sales but we collect our own email opt ins so our list is pretty good.

My experience has been it's more because of bad property management , most owners think they can buy  a commercial property and give it to a property management company (this one is one of the biggest in the city) and take ATM money every month.I try to write blogs as much as possible( see my website).  

Construction, construction, construction...This will be one of the biggest hurtles for the new flipper. 

I think that would be your biggest issue if it has shared utilities.

He already did the inspection (nothing major)It is a four plex in Lakewood, Ohio for 125k and i'd say needs about extra 10k (exterior paint and some more repairs)My biggest issue is I know that I'm as a renter would prefer to rent for the same price a 2 bedroom apt in a nice building in the same area instead of renting a unit in this 4plex.

I think the biggest thing is to find out what your spouse associates with real estate.

Biggest mistake of my life.

My biggest concern would be what happens if the brewery goes under AFTER they exercise  their option? 

The house looks solid for 170K, however I am assuming you identified everything that needed to be fixed and the electric was the biggest item?

While you can definitely find a deal on the MLS, the biggest problem is finding a seller who is motivated to sell, which is not easy to gauge by looking at a screen.