Here is a simulation using a $150K Purchase Price with 25% Down.

The stipulation was: "This simulates a person depositing their Monthly Income into the line of credit at the beginning of the month, paying Monthly Non-PI Expenses via a credit card, then using the line of credit to pay off the credit card AND the Monthly Loan Payment at the end of the month." 

(I ran a mortgage amortization simulation, if vendor is not looking for a lump sum, they can still get a nice monthly profit).  

@Nicholas Spinazze Yes, it spreads it out and runs a large number of simulations. 

Now Im hearing about a trust that simulates a series LLC... ?? 

That's the only way to spot an issue/clarify an assumption ahead of time.We use spreadsheets, of course, but the final summary fits on 1 legal sheet.I do recommend you play with some Monte Carlo simulations on your total cost before you get to far.

MySCOREiq or identityIQ [same parent companies] - my personal favorite, and also offers a "what-if" simulator to see how certain 'moves' will affect your scores >> mySCOREiq I Credit Report   2. myFICO - very similar   3.

I just made a first order simulation there.

ADT security signs, simulated TV, put a couple lamps on timers, etc. 

The green areas are actually Crystal Ball inputs that I use to run Monte Carlo simulations.