Ricardo, our brokerage has a specialty in investment and multi-family properties.

@Ana Vhan there are many commercial options where you can add multiple locations/multiple states onto a single policy.  

Congratulations on the duplex -My investor clients have acquired several multi-family investment properties locally in the market I operate in Northwest Indiana - Figure out your personal investment objective for the next 4 years and align yourself with the next property that make sense in this current market environment-

However, an easier option would be to use a bridge loan to help with acquisition and rehab financing if the property needs some work.

RentRedi has options of "Accept", "Reject", and "Request Update (more information)".

This means that if the bank forecloses, and you can’t pay it off, you will lose all of your money with no recourse to anyone.One option to secure your loan is if one of the partners has a free and clear property worth significantly more than your loan.

With the right resources and help, you can still make it happen.There are options that can help make buying a home possible today — even if your savings are limited or your credit isn’t perfect.

so, to recap, you need cash for: down payment + closing costs + holding costs.for a new investor, a live in flip might be a lower risk option than an outright flip. 

I'm just speaking from a new host standpoint with the interface offered from both platforms, options & booking results, AirBNB is much superior in my opinion. 

There are plenty of investment opportunities in the Detroit area as well which have the potential to offer immediate value, so I would weigh your options with care.