Leverage this position and do not be afraid to walk away because you're in this too "deep".

If you purchase land AND then build - you will be in deep that you will need to pay off the investors that likely funded the deal.

can you safely ground to rod 8ft deep but not attached to service panels?

It's entirely possible but is an extra wrinkle that costs money, maybe not for a 1st timer with cash flow issues. 1) Look for a better deal that will support itself and spin off free cash flow. 2) if you want to go deep on a house hack - What if your unit was also filled with roommates?

One of the key questions to be answered before we consider doing this is how deep the sewer line is.

I suggest: Just bank finance exit, don't get in deep by trying to seller finance to an occupant, many Dodd Frank issues, that are solvable , but why complicate this sale.

you can buy non performing notes at deeping discounts than foreclosures and you also should get a better cash on cash return if you get the note back to performing, if you include the payment back on your original investment.

Pick a strategy and do a deep dive into it 3.

A deep Google dive and searching more here will help. 

Do you have deep pockets to develop more lots into park?