I manage all my own properties and the time investment is minimal (most months).

However, my expenses  such as taxes, insurance, grounds-keeping, management, travel, and road maintenance are for the entire park; minimal increased expenses with increased occupancy.  

I'd like to boost my monthly income even if only minimal positive cash flow in the beginning.  

In order to minimize our risk of the buyer canceling the contract, I was think a decent down-payment and a detailed spec-sheet.

Hi Tiffanie - I strongly suggest your have a good real estate attorney help you with this, to minimize risk. 

As for the taxes, they're all going to be personal income tax anyway, and if you've got less than say $50k in profits the tax savings available from the "payroll vs profit distributions" (which is the main advantage of the LLC being taxed as an S-corp) will be minimal, or non existent anyway.

So either way you are touching the transaction each month if you want to maintain accurate books, however the amount of time this takes is extremely minimal and anyone at a later date could be trained to do this.

I am planning on using the banks money to make me money haha so I was going to just save my money and pay the minimal on my mortgage so I could invest more and get more properties.

I've seen some that allow you to use rental income from your departing residence even with out a physical tenant in place at the time of close on your new home etc, A Knowledgeable lender will know how to best express your strengths and minimize your downsides to get you the most effective financing scenario that hits your goal and criteria. 

If you are strictly looking to get involved in real estate with a minimal amount of hours and a flexible schedule for some extra money, I'd just become an agent.