And the neighbor I'm selling to had their house for sale, so I called their agent and told them if she sold it I would pay her the commission.

Pro Forma was mentioned in a Rich Dad Advisors book called ABCs of Real Estate Investing by Ken McElroy, it is found in the sales brochures, which now made sense that you mentioned that it is provided by the seller or the seller's agent.

Purchase price: $65,000 Cash invested: $65,000 Sale price: $70,000 owner financed for 20 years cash flow $411 What made you interested in investing in this type of deal?

Commercial property being used as a cell phone business.  4 years left on lease at $2000/month rent. I own building but not the business.  I put on market for $200K.  Tenant put in offer and after some back and forth ...

If you offer other 'services' like Short Sales or Loan Modifications, then Property Solutions might fit better.

Is there any way I can use the gain from the sale of the land to pay down mortgages on other investment properties? 

So, if you did 50/50, you would split the monthly profits (cash flow after operating expenses and debt service) and the proceeds at sale. 

You will need to coordinate wording of your lease.

As with any For Sale By Owner (FSBO), some are good deals (meaning they easily exceed the 1% rule) and bear out a good ROI after more rigorous analysis.  

I know all real estate is local so take it for what is worth.I am in Baltimore at courthouse auction currently and already heard from 2 associates that things are softening on prices, sales and rentals (all fronts).