Perhaps one of your parents is willing to be a non-occupying co-borrower on the loan to help supplement your lack of income?

Is there a particular reason why you don't want to get licensed/bonded as a General Contractor to supplement funding for your own flips/BRRRRs? 

Take half of the profit we make from the sale and invest in an income property to provide cash flow to supplement our salaries for our next purchase4.

Conventional with or without hard as a supplement will depend on your cash position compared to the deals you find. 

And the city is supplementing Amazon's impact by helping to develop the southern end of Academy road down in that area, so more businesses will come in.Again, this is all to say, I think Amazon is obviously a boon for an area.

Your monthly income will need to be at least twice as much as the mortgage payment will be in order to qualify, but you can get a co-signor to supplement your income as a plan B.

I agree with @Joseph P Finkelstein that finding a co-signer to supplement your income is your best bet, if at all possible.

To supplement while I still focus on direct sellers.

Our goal is to invest in properties long term with hopes of supplementing our current monthly income (15k) with real estate. 

Are the baseboard heaters just supplemental, or are they supplying all of the heat for the apartments?