Of those single family homes there is one that was owner-occupied for a year when we moved in. Since, it's been locked up and has had no renters. The couple that own it own several properties across my city, which I came to know as I got to know one of the owners while they lived here. It perplexes me, and the rest of our neighborhood, how someone can float a mortgage, much less an investment mortgage, without a renter. My owner-occupied mortgage costs me somewhere around $2600/m, I can't fathom paying two with one at a higher interest rate. Apparently this situation is common around my city.
On the other hand, and a bit non-sequitur, is two homes will likely become dense housing. They're foreclosures of properties that were inhabited by meth addicts. The whole property from the building to the soil will need to be removed for various reasons. At auction the properties were purchased for the average sale price of a home of that size that had no pre-existing issues. It won't be the kind of housing people need though, if I'm a betting man; my city has plenty of SROs (single room occupancy) but they're at the wrong price point. They're now called "lofts" and "studios" with a price tag to match. What will be lost is two 50+ year old homes, and likely the ability of our street to tolerate the traffic it was designed for as another issue is the city not investing in road-building and maintenance on our street.