Detroit can be a fantastic market with strong cash flow and good appreciation potential, but it’s definitely a unique place with its own quirks.Starting with cash is a smart move, especially in Detroit, where local knowledge and relationships can make a huge difference.

For example, cheap goods at Walmart let people buy more cheap crap but at the expense, at least partially, of good manufacturing jobs that supported local communities. 

Other international markets may be too opaque for me, and I'm definitely going to invest in China as it's not possible to even have more than one property in your own name (to the best of my knowledge) and the local government can find many ways to screw you over if they wish to.

In addition, I would give the tenant information about the local place that handles rental assistance programs.

Now to provide extra comfort and convenience to our buyers (who are mostly out of state) we agree to help them out by getting them set up with local property management that we work with closely as well as assisting management market the property for rent to place tenants.

Should I have my local friends stay in the Airbnb and give me reviews so that I can get the ball rolling? 

@Hamidou Keita House hacking by converting a single-family to a duplex is a smart strategy, but requires careful planning.Pros: Offset living expenses, higher rental income, increased equity.Cons: Significant conversion costs (permits, construction), zoning restrictions, living in a construction zone, managing two tenants.Key Considerations:Feasibility: Check local zoning and permitting.Costs: Get detailed construction estimates.Market Analysis: Ensure post-conversion rent covers expenses and there's rental demand.Resources: BiggerPockets forums, local contractors, real estate agents.Have you researched your target property's conversion potential?

For out-of-state investing, find a trustworthy property management company and network with local real estate investor groups.

With technology and the right culture property management companies can be successful with a mix of local and remote team members. 

Laundromats are open to the public, and if the local neighborhood has a high crime rate and transient population, those can be potentially expensive problems that can affect your business.