If I personally guarantee the mortgage, would that be equal to piercing the corporate veil? 

Want type of corporate entity should I set up...llc, s corp, partnership?

Cross reference those to future rail expansions and bigger corporations moving I to the area.

As many of you know the economy around the world has been going a little bit crazy and its just about time before the effects start to effect large corporations in the US in a very significant way.

On the other hand, creating a C corporation for managing these LLCs and/or properties could have a lot of tax benefit and tax shifting strategies.

In some cases you can keep the corporation active and operate a "frozen" plan. 

They don't lend to corporations.

@Alison Rauch are you buying in a corporate name or personal?

Imagine your Goal is to find Financial Security (first) and eventually complete Financial Freedom (leave the Corporate gig) and you want to achieve in the next 10 years a monthly net income of 30k monthly, become an expert, and dedicate your professional (and great part of the personal) life to this industry.

I am reconsidering if I should hold the flip under the C-Corp or perhaps create a NEW LLC or S-CORP, take out a SBA Loan, fund the house, and pay back the loan immediately and have access to the profits for a future flip or to re-invest.