Sold for a significant profit, paid off mortgage, HELOC, and solar loan, made over $100k.

Thank you so much, I will explore de 25% option with the commercial loan.

The area has been untouched but has gas lines and electrical and is surrounded by a solar farm.My question is, where do I start?

Welcome @Erin O'Brien the Philadelphia suburbs (Delaware, Montgomery, Bucks, and Chester counties) are some of the hottest markets right now to get into.

Do you know if it is possible to structure a transaction in the same way you've outlined, but using a Delaware Statutory Trust DST instead of an LLC?

De. 2020 BOOM!

They aggressively de-lever to not only create more cash flow without having to buy more assets, but also because they are starting to think about estate planning and how to efficiently create a very comfortable life for their kids.Lots of debt, long term debt or no debt are all right answers.  

Because that may sway who and how you interact also.Plus what kind of money are you bringing to the table to do this, are you broke and hoping (it's purely an academic exercise) or do you have some De-naro to put into a project(???)

Anything $2500 or below can be deductible via de minimis safe harbor.Higher expenses need to be capitalized.You can also do a Cost Segragation Study to capitalize some items quicker based on life expectancy. 

A co-worker told me of a house being auctioned on his street (a cul-de-sac).