A foundational model based on a strong market (jobs/population exceeding averages and projected to continue), conservative deal assumptions / modeling (rents, occupancy) and an experienced team should weather downturns. 

Spend the best few hundred bucks you have spent in years.....sit down with a local RE attorney familiar with foreclosures, with your list of questions/assumptions.

That being said, I would push back on the assumption that you are bringing to little for the table for a real estate investor to partner with you.

If they are really returning your capital and you have no assumption of debt then absolutely you'll be involved in a step transaction - that's just another way to access profit.But I'm having a hard time picturing that scenario. 

There is an assumption born out in case law that "productive use in trade business or investment" implies a longer period of time. 

If my two assumptions are correct, "A LLC" will be exchanging its current duplex into a combination of 50% interest in the land (purchasing it from JS) and a duplex to be built by "A LLC" in the future.

I'm wondering if there are other BP'ers willing to take a look at one of my deals to see if there is something I'm missing in the analysis or if there are assumptions within my deals that I'm underestimating.Here is the link to the deal - https://www.biggerpockets.com/calculators/shared/916449/7da6c614-e8cc-41b9-9e15-965565b159baAbout the assumptions:This is the Charlotte NC areaPurchase price shown is the current asking priceProperty taxes are from the assessor's office and the monthly income is the average for 2 beds in Charlotte.My goal for deals is cash flow.Any and all thoughts/suggestions are welcome!

If it is an FHA and you meet the criteria for the assumption, then you can probably prioritize trying to assume the original mortgage first and paying the Seller the $50k.  

My assumption is you did not.

But now I'm thinking of venturing out.I had always run under the assumption that buying plots of land and developing couldn't really be profitable in my area, as land prices immediately around me can be a bit insane.