Note that Sec8 comes with added costs & issues due to bureaucracy and state of the HUD departments in the area.

If the income requirements are met, credit looks good, and employment history ( at least 6 months +) at the same job, move forward with the applicant and request additional deposit.That's an old eviction IMO.I have a current tenant that I leased to with low 500 credit.

Occasionally I'll see properties coming on the market where the seller has a VA loan with a low interest rate.  

Both of these allow you to low down payment loans to buy a primary residence with fixed interest rates.

I'd recommend looking at costs. your build cost is going to be well over other homes because of the fixed costs like slab, Hvac, roof, etc. check the market drivers and weight the benefits of short term versus long term. long term is no furniture and help pays mortgage but at this size it doesn't really cover everything. we didn't find a lot of economies of scale in single family detached. can you build more than one unit?

A debt service loan would be a good option if your DTI is high, you want to close in an LLC, you're self-employed or have low income on paper, or you don't have a stable 2-year work history.

Based on my experience of running properties, even if the build were to cost you as much as $600k but you could generate $125k/year, you'd be very happy with that investment. 

They also tend to offer good cash flow relative to their cost, especially in areas with high demand for affordable housing.

I did not include vacancy, repairs, management, and other cost, When determining what I was going to rent them out for.The one critical thing you never told us is what is the current rent and what is the current market rent.

HelloOver saturated STR in Ohio markets have caused many STR to drastically lower costs to as low as  $100 for entire bedroom home.My are higher and I'm not competitive with the lower cost Abnbs.I also feel hotel industry are mass building new hotels to compete with str.