As mentioned, we "openly and notoriously" record the deed for the world to see so there is no hiding things from the bank (which could be construed as fraud not to mention poses many other risks for creditor liens, etc.) 

Then there were some issues with the inspection report that ruined 3 contracts prior to me getting involved.

Hello Frank, I think house hacking a small multifamily property that you buy with a low downpayment is one o the best and lowest risk strategies that you can get started with.

I was involved in two small infill developments in Michigan (about 15 houses in total) so two very small parcels. 

I am left to wonder, though some investors with SFR's are doing it successfully, is the risk too high for the reward?

I made a few deals in North Dallas.Special assessments and HOA fees are a risk and renting out a condo most likely won't generate much of a cash flow.At $300k with you credit and saving you can still qualified for a loan for sure we have to find the program that works for you.On that budget you could find a nice place no that far from work so you don't have to move far to the suburbs. 

Class D risks > Class C > Class B > Class A, but how many investors even know what those risks are, let alone know how to account for them in their ROI calculations?

Diversifying your portfolio can also be beneficial, as it helps mitigate risks associated with market fluctuations.

We are both 28 years old with zero experience prior to getting involved, she works for the business now and I work Blue Collar in the trades. 

The CA notes were 12% with not much risk so at least that amount.