If you have a budget and allocate the costs, not sure why you would need a different bank account for each?

Go to Solera National Bank or Titan bank, both of them specialize in accounts like this. 

They can separate themselves from traditional real estate investors by building a robust EIN Corporate Credit ("Ever-Increasing") investment infrastructure that allows for faster portfolio expansion and more sophisticated financial maneuvering.

Wheatland Bank was good to me but the lender I worked with has since retired.

He would also not need any private money lenders to close these transactions -- his bank would be dying to give him a commercial line of credit. 

That includes going to the bank and getting a cashiers check.Pay them at the bank, get deed notarized there, then take it to Register of Deeds and file deed.I have done this a half dozen times to keep from missing out on a great deal.For what I'm paying any risk is negligible.  

Can you throw out names for Missouri resources they have worked with before on investor friendly realtors, tax experts, and investor friendly banks? 

If you're capable of getting funding from a bank, those terms are terrible.

The builder usually has some type of warrenty other than that closing is pretty traditional which would have been similar to your first house. 

For a traditional Heloc at most small banks/CU's, the rate will be variable and will be WSJ Prime + a spread that represents the borrower's credit risk.