On the other hand, I feel one of the main advantages of passive investments (via syndication/crowdfunding) is that I can hire a manager who has years more experience than I can ever hope to obtain myself.

I don't know if the main participants in this discussion deserve medals or need better hobbies...

If the property can service the debt at 90% leverage between a senior 1st and the seller second, you're looking at a good investment!

I've flipped 6-8 houses, made good profit on those, and just purchased my first 4-unit multi for mainly cost seg purposes/long-term appreciation. 

Just a follow up question, were you utilizing debt to invest, I have always been taught since a young age to try and not utilize debt (I come from a family of stock market investors, traditional business owners) where debt is not utilized as frequently which I obviously understand debt can be a very powerful tool and utilized in a great way its just something I want to avoid with my investments to an extent any suggestions for investing without debt or as little as possible. 

Asset sold was mainly transfer of client list and contracts.Does it make sense for me to seek out a note purchaser?

Two main reasons being: (1) debt does not increase your basis in an S Corp, which means your losses get limited.

(This option would would not carry any debt, all debt would be paid in cash)Or keep our current house, rent it out, and cash flow NET monthly about $1,500?

In my area finished basement sq. footage is valued around 25-40% of the main sq. footage.

You may want to research the term ' Debt Financed Distribution' Which does have a tax implication for the investors receiving a distribution.