Is there anyone running a successful flipping business that would be willing to share their P&L statement or can provide info on what a healthy COGS vs Expenses ratio looks like? 

Initially I was thinking of approaching them with the idea of seller financing, but the bank between us would make it awkward.

If you're set on building on this land, it seems you may want to get pricing figured out in a more for sure approach (as you can, I realize material pricing right now is not 'normal') to get an idea of how much you really can afford to build.

Nothing but complaints about small items...some have been big, obviously, but just a very "adversarial" approach when it is totally uncalled for.

I'm taking the advice and calling the county to see what is their exact approach.

If anyone has any insight on how to approach local banks vs big banks etc. to get the best interest rates, it would be much appreciated. 

How I typically approach this is to connect with the listing agent to get as much info as possible.

On the Seller Financing you could present it as a way for the Seller to avoid paying capital gains as a result of a sudden financial windfall from the sale but instead getting a healthy downpayment and a monthly payment with an interest rate that is doable for you but attractive to them. 

Is there a more streamlined approach?

Does anyone have any advice for my situation and how I can approach my next action