There is a reason most banks will not lend money for properties under $50K. 

You have to provide the financing for us to buy the new property - either from cash reserves, a private loan, or a loan from a portfolio lender like a community bank.

Maybe a finance-related position with a company in the real estate space like a construction company or a bank / mortgage company. 

not really, but if it's a smaller bank then that explains why they are staying so tight.

I have few REOs I'm about to make offers on  however banks does not accept assignment.

From a bank standpoint, they will have a clear picture of who owns what and has what degree of liability;  however, all of the investors will have to produce tax returns and documents to the bank to show they are credit worthy. 

I called Bank of America because that’s who I bank with but it seem like it was nearly impossible with them.

If they want to pay more than 40%, make sure it is by wire transfer from a domestic bank. 

One downside I experienced there was that the contractors guys kept failing inspection and even closed up the walls not knowing the electric failed.

My usual go to bank can't finance it because the contract isn't between myself and the actual seller.