If my spouse was willing to move more frequently I’d house hack a 4 unit every year.

Run the house hacking numbers.

If the property is vacant, you will attract a larger pool of buyers as not everyone looking for a house wants to use it as a rental. 

As others have said, the best thing your son can do is run far from this deal, buckle down, save his pennies (he probably already is doing this), house-hack, and improve a property with sweat, hard work, developing a DIY skillset, and self-managing tenants. 

Buying a large new build home can also work well as a house hack as you can charge a premium rent, and generally most bedrooms built now a days have en suites (at least in my market).  

There are a few Dundalk neighborhoods I'd stay away from but for the most part it's a great area for house hacking/BRRRR.

Not only do we find the housing market to be a little more manageable, but a lot of people travel there year round. 

Those houses could rent anywhere from $1,600 per month to $2,000 per month. 

How much will you spend in repairs on a 1920's house with renters ? 

This cultural preference for renting creates a steady demand for rental properties, ensuring reliable cash flow for property owners.Additionally, many Germans face a significant shortage of affordable housing, particularly in major cities like Berlin, Munich, and Hamburg.