I really like Irving and Avondale b/c the prices are reasonable and with mildly upgraded units you can really push rents while attracting a very nice professional renter.  

And also in how to attract further potential clients.

If you have a lot of passing traffic that would certainly attract some attention.Interested to hear updates as you go along.

that may be a little more than what could be included for a good ROI on this project, I guess it'll depend on the remaining numbers as usual, though visually it would have a huge impact and the target market for this project would really be attracted to it. 

I would say to make sure it suits your personality type: you and your wife can take as much time reading those signs at all the little roadside attractions and parks, you have nowhere to be.

If there is a lower priced alternative that has the same results, that will attract buyers and sellers.  

The brew city has been voted as one of the most attractive places for enterpreneurs and millenials.

The property that I have in MI is performing well and I think I can get 2 or 3 there that will attract better quality renters in general.

A coin operated washer and dryer should pay for any increase in water or electricity and would most likely attract a better tenant class 

Here are some of the pros and cons that I see:Pros:Property management costs would be lower over the life of ownership due to proximity of homes in portfolio, low maintenance flooring, siding, etc.You could build them with more robust systems(HVAC, plumbing, etc) knowing they would always house rentersYour portfolio would be concentrated as opposed to spread all over a geographical areaYour exit strategy would be super attractive if you were to sell as a packageQuicker than purchasing and potentially rehabbing an older property, and accumulating them one by oneYou could sell a percentage of them to recoup a portion of your investment, and rent the rest, which should put you with solid equity from the gateCons:Entry costs and length of time from start to first months rental income for constructionFunding the construction, or finding the right lender to fund such a property/developmentKnowing the correct price point of the finished product, or what the community is lackingLocal zoning or possibly being prohibited to build SFH to rentHigher construction costs vs. multifamily(apartments or townhomes)I know there are many other strategies out there, but as one wanting to accumulate a nice rental portfolio, this seems to be a solid approach.