There's no way to know for sure how they will hold up until they have actually stood the test of time in real life (not in a simulator).

I don't know if anything like this exists but what would be extremely helpful is a simulator that would provide me with a pool of mock properties that I would have to evaluate all factors and select the best deal. 

They are currently updating the credit simulator where you can figure out what you need to do to increase your credit score!

I think it's safe to say we are in a bad day phase and that escrow agents and most title companies are reluctant to funnel money backwards.The simul close thing, with one escrow and and principals A, B, and C I've never actually seen happen in 12 years of buying and selling.

For example when I have used a FICO score simulator when I put in 0% utilization it gave me a grade of C where has 1-10% gave me a grade A.

Fico's version is "Fico Score Simulator". 

One can run simulations on withdrawal rates and asset allocations.

If they claim their favorite hobby is staying home playing flight simulator in the take off mode but not landing mode, run.

You can do simulations to see what moves will help or hurt your credit score.

They have an Income Statement, a Tax Package (probably either of these would be what your accountant needs), and even a stress-test that will simulate your performance in a market downturn.