preapproval or prequalification on 16 unit offer

[Charles Mangum]

I am going to put an offer in on a 16 unit for $500k.  The property just came back on the market and i would think the seller would want to see a prequalification or preapproval letter from the local bank I've been talking with.   Is this a good assumption?   Also the property is a value play and presently only 50 percent occupied.  Will the bank provide a preapproval or prequalification on the property or just me at this stage in the game?