Depending on how you set it up, it won't reduce your earned income, but there may be benefits to making the rent itself tax-free for many years or at least reduced (assuming you never recapture depreciation).

Then rent or sell.

I listed my home for rent and was contacted by a company who is interested in Airbnb arbitrage.

DSCR financing is based off of rent/PITI and your credit score. 

Rented and cash flowing, over $100K in equity.

Was the cost to build worth the additional rent/value the property sold for?

If you intend to have it managed after purchasing, reach out to a couple STR property managers and have them offer their perspective on what's worth fixing, what amenities you need, and how much they would rent it for.

Value will be added by upgrading the apartment units to achieve market rents and securing a new tenant for the vacant commercial space.

We currently have 1 paid off home in woodland park that we have been renting for the last 4 years and wanting to grow .

At a price of $525 for all four and $4800/mo in rent it misses the 2% rule.