.: Hi, I have  four sfr properties that I rent out for my personal income as well as a business investment. 

Owe 80k on my house and just got out of school with an expected income of 70k (no debt other than my mortgage).

Then use the extra roommate rent income to pay down your mortgage and look to refi to a lower payment in the future (3-5 years) - so it cashflow when you move out.You could also choose the smaller unit and STR the other unit to generate more cash to pay down your mortgage and refi, so it cashflows when you move out.Bottom line: you'll have to get creative to solve your cashflow challenge!

Fixed income...would container village actually be a cheaper proposition vs lets say a senior living 3-4 story apartment building for the same number of units? 

Assuming you have another stream of income when you move there and I hope you do, I would recommend using the smallest amount of capital possible and invest in the most doors (1-4 units) that you can. 

Focus on building and maintaining active income first.

If you need income from investing than you do need to focus on the cash flow viability, but as you said, both is best.

Are you aware that a percentage of rent on additional units of MF can be used as income to qualify for the loan? 

If the taxes are killing your cash flow, you'll need to either negotiate a lower purchase price to offset the tax burden or budget for some property improvements that could increase rental income and help balance things out.

We live in this nice house because I'm covering some of the mortgage expense with the income from the house hack.