I think a better approach is working together.

I do have a question, I have some properties I would like to put under contract but I haven't made my first deal yet and I'm not sure how to approach a seller and what to say. 

How would others approach my situation? 

What are some terms that I can approach them with?

They are offer hand written products at scale for a more personal approach.

Remind them as move-out day approaches to be out on X day / X time or the following fees will be accessed.  

Those are some of the same reasons I got out of flipping houses and long(er) term buy and hold rentals and syndications.And you are definitely taking the right approach by working through the tax implications with your CPA. 

Cox, a local service provider, has approached us asking us to sign an 8 year contract in exchange for a $10,000 upfront payment in addition to $1,000 quarterly payments.Does anybody have any experience with them? 

I think the best approach is to ask up front and maybe add a footnote to the application.Regarding the 10 mortgages, Once you hit the 10 limit, there are still lots of lenders that do other types of loans, As @Kerry Baird and @Rod Hanks mentioned .

Developing that trust with someone you don't know may seem like a challenge, but if you approach it correctly, you should be able to achieve a pretty solid foundation of trust.The best way is to target sponsor who use professional 3rd party administration that verifies the sponsor, their background, their track record, and their performance.