The transaction costs of buying and selling a home (particularly the sell side) really eats into the margins.

You might want to consider what specific sweat equity you are offering, and where you are located.

If those rules include interest rates at specific amounts, I will still find a way to win.

Not even sure where you are pulling 30% from...Taking money from a traditional retirement account(non-Roth) now or later is subject to income tax at your marginal income tax bracket.Any 'planning' around distributions that you can do later can also be done now.If you want to take money out in a year where you are in a lower tax bracket(result of going back to school, taking a year off from work to travel, a year where you have a lot of losses from real estate via Real Estate Professional Status, etc).Also, hard to say what your income / tax rates will be when you retire.

If you have any more specific questions or want some local help, feel free to reach out. - Chris 

Hey Shane, I'd recommend some sort of short term financing with using your personal assets as the collateral or something besides that specific property as collateral.

Sure, no one has to accept any specific offer...calling for highest and best doesn't mean they have to choose highest and best, just that they're saying they want to make sure everyone has put their best foot forward.

In most jurisdictions when you rent a SFH everything on the lot is included unless specifically excluded in the lease.  

and is this your thought on my situation specifically, being a total beginner?

You're right, a CPA would be able to answer your specific tax questions, but I do know that as a single member LLC, the default tax status is disregarded entity.