This property is gonna cash flow over $1000 a month after we're all said and done with utilities mortgage and more.

Did you have taxable income that could’ve been reduced utilizing tax strategies?

It may not get the number of wind/hail storms like TX does, but when the storms do hit in MN, they're usually very large systems, and produce awful hail damage. 

This amounts to lost opportunity because if you had purchased RE, at the closing it can start producing return. 5) ADUs detract from the existing structure whether this is privacy, a garage, or just yard space. 6) this is related to number 1, but there are many more buyers looking to purchase homes for their family than there are RE investors looking to purchase small unit count properties.

Does that include utility service to the house, a driveway, septic and well? 

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.

You can also tell her to call the utility company about the best way to save, as turning off heat and on is not efficient having to run longer blasting out cold air as opposed to leaving it set at a lower temp. :)

They do an inspection, look for potential costs with repairs and produce a final report.

Cost segregation utilizes the MACRS approach.

Now purchasing a home with cash is always good b/c obviously cash is king but also I think the part you might've missed is that, the money your utilizing on these home's won't actually be yours, but the banks or whatever institution you used to fix the home or make its value worth more.