Would anyone be able to offer general advice to this approach? 

Prince Georges county in MD also offers over the counter liens.

There are a lot more things that occur as part of the contract that would be included including valuations for each parcel, specific tax consequences, proffers offered to the city etc. 

You can determine if the cost segregation study makes sense by speaking with your accountant and many cost segregation professionals offer a free analysis.

We not only offered them a better comp package, but we offered them the opportunity to work for people who knew real estate investing as investors, not just as lenders. 

Meanwhile, the sellers who are most likely to offer creative financing are normally the owners of  real estate that have issues.....condition.....low barrier/over supply market......or perhaps pricing issue, and one of these factors is why its not marketable in a arms length transaction and why creative financing would be accepted.

According to Realtor.com, EMD is typically between 1% and 2% of the total home price and is money you pay as a show of good faith when you make an offer on a house.But, it’s not an added expense.

Have a meeting set up tomorrow to make an offer on 25 acres.  

I will keep that in mind when discussing the offer

Find a good lender, get pre approved, make sure you practice running the #'s using the 100's of videos and guides from BP, find an investor friendly Realtor, and then start making offers on any property that meets your goal.