Is the title company reputable - this part is easy2.

Steady deals that perform well and a solid reputation in the industry.  

Valuation for Property Management 3X to 5X Seller Discretionary Earnings or 1X to 1.5X Annual Revenue, depending on how well established the brand and reputation is in the market, market share, number of units, scalability, etc...Transaction Structure, never buy a Property Management business for cash,  you must include an earn-out structure or provision to protect the purchase against clients/property owners leaving post-transaction.  

I agree with Min's suggestion to start with a reputable turnkey operator. 

Protecting one's digital reputation is important. 

Despite its awful reputation, I see great potential due to its proximity to key attractions.I'm reaching out to ask: Are there any plans to revitalize this neighborhood?

Biggest difference from CA are much more favorable landlord laws, taxes do NOT reassess on the sale, and still high appreciation due to land constraints, proximity to Lake Tahoe, tech and manufacturing job growth, Tesla continuing to expand, etc. 

Don't overcomplicate seller financing.In a conversation with my Mobiel Home Mover, I told him I got another Manufactured Home Community under contract with seller financing and 0% down.

@Justine Phillipson, would you say that, with the development of the TSMC manufacture in the NW of Phoenix, the house market is blooming ? 

But because Detroit has bad reputation in the media, I believe many investors would avoid it and I may have lesser competition, in comparison with Cleveland.