How to buy a bar

My husband and I live in Northern California. We’re looking to buy a bar with 2 dwellings on top of it. 2, 1 bedroom apartments. The bar owner wants to sell it to us for $630,000. My husband and I don’t have the best credit But we really want to keep the bar in the family. I have 13 years of restaurant experience and 8 years as a bartender. does anyone have any advice on how to get a loan or what we have to do to be able to buy the bar. Thank you in advance!