If my spouse wasn’t opposed to moving I would try to buy a new house hack every 12-15 months and use low down payment owner occupied loans for as long as it made sense.

I was referring to Owner Occupied foreclosures in particular, when warning to stay away from foreclosures in certain states.I agree that door knocking would be the best way to get these deals down.

Once I retire, I'll supplement my income (and keep myself occupied) with rehabs and either flip them or use a BRRR strategy. 

Would you be looking to owner occupy the property or strictly as an investment?

For example in many jurisdictions I can STR units in a duplex but cannot STR an ADU (some jurisdictions will let you STR if you owner occupy).

You visit occupied properties?

Did you know that Fannie Mae recently lowered the required down payment to 5% for owner-occupied 2-4 unit homes?

Mordechai ChaimovitzTwo-unit owner-occupied falls into an odd category, really any 2-4 unit with a nice owner's unit for that matter.

This means there may be less competition from professional investors, especially in areas where the demand for owner-occupied homes is strong.In short, if you are just entering the real estate market and don’t yet have the capital to compete directly with investors for multifamily properties, focusing on single-family homes could be a more strategic choice.

You can consider the medium term route as a possbility as well so you can still occupy it for a few weeks a year.