I enjoy finding creative ways to monetize normally overlooked spaces at my rental properties.  I've been successful at renting out detached garages on a few of my properties.  I'm soon closing on a multi-family proper...

There's no one size fits all of course, but generally the STR/MTR/LTR mix in a multi-family unit can be challenging because the way renters utilize these properties is so different.

I am not sure about the other markets but I would suggest looking up a Realtor from here and utilizing their knowledge to help you. 

Then I would speak with a land surveyor or civil engineer to get a sense of what it would take to obtain all the entitlements and bring in the utilities, etc.     

That's the reason there are so many fourplexes and so few fiveplexes or even sixplexes.From what I gather, post offices and utility companies rarely care much about the permitting/zoning issues, so it probably wouldn't have been hard to get those set up.

I Offered it to them at 10% below market with him paying utilities. he wanted it, so I screened him to verify he can afford it.

And via the clustering we are utilizing green-space in a communal manner thus reducing foot-print of that BUT retaining such perception as each unit has walkout to what seems a BIG green space.

As this approach uses very little documentation, it is the least reliable methodology in preparing a cost segregation study.To see all of the steps included within each method, refer to Chapter 3 of the IRS Cost Segregation Audit Techniques Guide.What methodology has your company utilized?

Prepare for additional costs: If you’re adding units, you’ll likely need to address the water meter situation and possibly upgrade utilities.

Hope this helps...https://www.starkhelpcentral.com/rent-utilities-assistance