Looking for a PreApproval letter on commercial property

[Toben B.]

Hello,

I have a broker that wants a pre-approval letter prior to releasing the financial details of the property for sale. 

Although I think this is backwards, I can't really move forward without a letter and the location is prime so I want to learn more. 

Asking price is $1.5M and I can provide a 20% down payment assuming the financials make sense. 

This is a lakefront Mobile Home park.

I have a banker that provided me a letter on an apartment complex I purchases, but he will not underwrite parks.

Can anyone point me in the right direction?

Thanks in advance!