I am looking for a way to automate the ach payments.

Document says the deed or other conveyance document to be delivered at closing shall be a quitclaim or other instrument conveying Seller's interest in the property.

As mentioned earlier, a website can help you build credibility (if it looks professional), and it can also automate some things for you.For example, if your marketing includes a website, some people will go there for more information and can fill out a form that includes details you'd normally have to ask them over the phone, which can save you time.  

I haven't given it a thorough shakedown but everything should be automated if you increase or decrease lots.https://drive.google.com/file/d/0BxA2MyzJgUt5a0R5R2RmbmItR0U/edit?

@Fred Hamilton III Depending upon the state, but a buyers agency agreement is the most widely used instrument for what you are looking for.

Dti is determined by the lenders automated underwriting engine.

What we have done for few of our clients is create multiple bank account for taxes, capital improvement, and savings with automated transfers to/from bank accounts. 

Investing with others will be cleaner with a multi-member LLC and probably originating a note/mortgage as the security instrument for your investors.

With the movement towards automation, it seems like the personal touch is simply fading.I think there remains an argument to consider the underwriting standards found in the movie It's A Wonderful Life.  

They will look out for your best interest, provide insight, and be instrumental in assisting you in producing an accurate pro forma.