If yes, focus on those and deep dive those markets because you have a competitive advantage of knowledge or boots.

I would recommend the book The 16% Solution as it goes very deep into tax liens and tax deeds. 

I would start tho with increasing the insulation in the attic, depending on the type you have in they're now how deep it is you may need to add more, because you have no soffit from what I can tell means you have little to no ventilation in the attic so you may need to add roof vents to circulate the air.

There are plenty of deep pocket investors, mostly rich families, that like owning real estate here for the long term.

Even if units are vacant the appraiser, in complying with rules of the Appraisal Institute, will use comp rents to arrive at a likely rental rate for the vacant units, unless their is no demand for those units as rentals or the cost of getting the vacant units in condition to rent is greater than the net present value of the income stream they will produce.In any case, without going deep into methodology, MAI appraisers will determine if the demand exists for renting the vacant properties.

Have a deep conversation with lender, if they think they can get loan done with FHA and are willing to switch loan type mid deal it works. 

You might want to follow the "Deep Dive" series we're doing on our BiggerPockets blog about Metro Detroit cities, City of Detroit Neighborhoods and comparing Metro Detroit to other hotspots investors usually consider:https://www.biggerpockets.com/...

FIRE Team Joe HammelYou might want to follow the "Deep Dive" series we're doing on our BiggerPockets blog about Metro Detroit cities, City of Detroit Neighborhoods and comparing Metro Detroit to other hotspots investors usually consider:https://www.biggerpockets.com/...

YES, we may be a little biased, but check out our blog here on BP comparing Detroit to other cities and Deep Dives on Metro Detroit cities & neighborhoods: https://www.biggerpockets.com/...Your biggest question shouldn't be WHERE to invest, but HOW you will invest!

Drilling a new well is gonna run you some serious $$, Depending on how deep the table is of course.