Just by chance, this company worked on the home for the seller I purchased from, oh really.I obtain all documentation from this company, in regards to what the seller paid to have done.

Conventional financing is typically pretty straight forward and the financing you obtain really depends on how much capital you have to put down on a property. 

When purchasing real estate development property what documentation is typically needed to obtain investor capital or bank financing such as a ProForma, Argus Run, etc?

@Cameron DirckI don't think you should be putting offers in on properties unless you are certain you can obtain financing.

An investor can obtain a short term (Bridge loan) if the property has a value add component, then refinance into a perm loan once value add is completed.

Does anyone have suggestions on what insurance I should obtain to protect myself and if there are any additional measures I should take?

If I had no leverage, I invested the full value (again ignoring closing costs) to obtain 5% return on my investment when the property appreciated 5%.In addition, the lower investment amount means that the money not invested on this asset can be invested on other investments. 

I may be off on that, but since we opened our STR back in Nov of last year, we've had all 5 star reviews and obtained Super Host twice now.

With my BCL funds, my lender suggested paying off my mortgage insurance premium upfront to make my monthly payment more affordable.The second program my lender referred me to was a Mortgage Credit Certificate.

If you have a truly great deal, there will always be funding to obtain that property, whether through hard money, private money, or partnering.