That seem like a very low for a furnished rental.   

With down payments as low as 5-10%, plus low property taxes compared to the U.S., investing in German real estate is more accessible than you might think.If you’ve ever thought about owning property overseas but felt intimidated, stay tuned.

Estimated cost for remaining changes (all new electric, drywall, tile, fixtures, cabinets, roof, doors, windows, heat pump, some siding, and fencing.

Getting a mother-in-low to co-sign is not the answer.

Also control the thermostats so the tenants don't jack up the heat in the winter giving you a massive bill.

Estimated cost for remaining changes (all new electric, drywall, tile, fixtures, cabinets, roof, doors, windows, heat pump, some siding, and fencing.

Low or no down, seller financing and low or no interest with a balloon payment later is the holy grail (location, building condition, market also matter but it sounds like you have all that).

Quote from @Patricia Steiner: There are several lenders who offer low/no closing cost options for first time homebuyers.

I was thinking of starting a rent increase for my 1 bedroom tenant voucher due it being low and well under fair market value(Based on  hud and zip code) but my tenant is in the process of having a caretaker for her disability and getting approved for a two bedroom voucher.

Let Title put the heat on the seller to remit through them.