They're all going to use NOI/PITI, but you'll experience a range of DSCR requirements which will directly affect your max LTV and you'll also experience a range of rates.

Folks get caught up on losing their interest rate.

However, despite several months of searching, I'm struggling to find properties that break even, especially with current interest rates.

I think most investors are feeling the crunch of low inventory, higher prices, and high interest rates.

Obviously you want to pay attention to your interest rates, cost of appraisals, and fees for refinancing.

Price wise, houses in the area mostly follow (roughly) national inflation rates.

They will hit you on the interest rate and LTV.

So your success rate is 0.1%. 

After the low rates started to increase when the FEDs pushed to raise them the inventory went up significantly (in January 2022 there were active listings on the MLS of 40-45 listings, now if you look 160-170 listings).

As for house-hacking an existing quad, only putting 5% down in this high interest rate environment will almost certainly mean you won't be "living for free" as is the point of house hacking.