I spent months, no, years, reading books, buying No Money Down cassettes, (Carleton Sheets, anyone?)

Without any cash it is unlikely unless you can find a 100% seller financed deal (they do exist, I just did one a few months ago).

Pace said he had 4 in one month earlier in this thread and in this video from a few months ago he says he's had 10 now.

Because, for instance, if I am flipping a couple of properties and I am in the middle of the rehab, but it will take a couple of months for them to get finished and sold, I may be paying $4000 on hard money debt payments per month, and if that debt is included in whether or not I will qualify for a refinance, then I may not qualify.

Hey Stepan, Some changes I'm advising and seeing my clients implement are expecting an extra 3 months of holding time and undervaluing the ARV just a bit due to high inventory on the market. 

It is much better to have a reserve fund and add it monthly.

Do you prioritize cash-on-cash return, equity buildup, cap rate, monthly cash flow, or something else entirely? 

US credit score (At least 2 scores must show) or Foreign Credit (At least 24 months of history with 2 tradelines).

Average rents are hovering around $1,100 a month, and properties are getting snatched up fast, with vacancy rates staying low.

And your S-corp must have funds to make monthly payments to you.