However, i want to address placing a tenant.My market has a low vacancy rate.  

A property could be cheap but be located in a low performing market.

It makes less and less sense in a market with low inventory and high interest rates.

When you own a couple of units, the odds of there being unexpected vacancies that overlap each other are usually low, but when you acquire more and more real estate, the odds of tenants moving out around similar times increases. 

Rents are low and prices are high.

For the duplex, would you consider it to be in a high quality (A), medium (B), or low (C) neighborhood?

Note you must be an accredited investor to participate.A con that turn some people off DSTs is they come with higher fees than out right owning a stable, low maintenance property; however based off what you described DST fees are far below what you are currently paying. 

If you’re just going to do one or two flips a year keep your costs low.  

These properties appeal to students and low-income renters, especially if traditional housing is limited.

Also, for low value properties, most lenders wont take the risk.