Section 8 rent payment standards has the city willing to pay up to $3,120 per 3 br unit so I used gross rent of $6,240 given rent for the furnished 2/1 unit would be too variable with partners living there as they please.Phila.gov info:https://property.phila.gov/?

I couldn't have predicted this nine months ago, but I'm smart enough to predict things like this will happen eventually and I plan accordingly. also highly dependent on class of asset.. where in the country it is. and tenant base your renting to.. your mileage may or will vary depending on these variables.

Consult a Professional: Given the complexity and variability of these regulations, it is advisable to consult with a real estate attorney or a professional specializing in mortgage notes to ensure compliance with all applicable laws.For detailed and accurate information, please contact your state’s regulatory authority and seek professional advice.

Pay it off with a commercial DSCR refinance loan once you've gotten the rents up to an amount that will allow you to cash out on your HELOC.I like using my HELOC but only in short-term scenarios because it's a floating rate and I can't control when or how the bank will make adjustments to the payback variables. 

@Susan Thelen it’s likely easiest you do this in excel so you can easily modify variables and test the NPV sensitivity.

And if the home becomes vacant and money has to be invested to re rent.There are a lot of uncertain variables which add to the risk.

Aside from zoning issues, permits, and city/county requirements, which are highly variable, I'd like to get an idea of how many units/buildings and how to lay it out for most efficient use of space for those 2 acres.

Of course there are more variables and it gets more detailed than this, but this is merely a starting point to narrow down markets that you really want to invest for research in. 

I know there's so much gray area and a lot of variables, questions, etc., but I'm just looking for any insight.

Be conservative in your rent projections and overestimate the repairs.I am not sure what the age of this property is, but I have found with older properties (mixed-use and apartment complexes), there are several variables that are typically not an issue with newer properties.