I invest in Detroit as well, and it's a city full of opportunities if you take the time to understand it.A couple of quick tips: Get familiar with the neighborhoods—Detroit is very block-by-block, and the difference in property conditions or tenant quality can be drastic just a few streets apart.

You can get a block shot of the neighborhood as well which shows you what the other houses are worth.No, you aren't an appraiser.

I also liked the fact that it was structurally sound with concrete block construction, a tile roof, and high elevation.

I  started keeping an event journal to remind me of issues or unique incidents that impact the income/occupancy of each property, including maintenance block-offs. 

One stumbling block of another full(ish)-service discount broker, Homie, was that it paid market-standard (2.5-3%) buyer agent commissions.

In PA, and this property is 3 blocks from N.Broad Street

There is a cinder block structure on it now that is basically a 1BR, 1BA shell with plumbing fixtures, but no kitchen.

What they and we didn't know was the real issue was the line itself was mostly blocked some 30' to 40' away under the driveway.

How do they know if this is an owner stay that you blocked on your website, and it pushed over to Vrbo?

Area, tenant use, tenant credit (i.e. only Moody's BBB or better guarantor credit).There are a lot that can vary in NNN, just like any other real estate.You have market risks: FL has another hurricane coming, CA has earthquakes and wild fires, the midwest has anemic population growth.You have some location risk: is building on hard corner with signalized access or buried mid-block with no turn lane?