I understand your perspective, and can appreciate your position as a Buyer with these types of concerns. 

@Waylen Herdman What is your concern with obtaining a mortgage?

Both have basically the same rules as the IRS is concerned.

I don't know how competitive your market is but hopefully it isn't that competitive where you have to be concerned about raising your price $10... 

I thought about super basic with just name, number, and email address and maybe some goofy slogan about making deals as a start.

Is there a discrimination concern or a procedure or exception(s) to follow in order operate as such? 

That would concern me more than how to make your $300k offer stick.

We are also hesitant to put our full return address on the envelops.

In reference to your question I may be able to shed some light on your concern as it regards to structuring a Land Trust.

Usually lenders will look at the past 2-3 years of real estate activity and a schedule of addresses you closed on to confirm that experience.One way to secure better terms is to partner up with an investor who has recent experience.