Funding for purchasing an existing business

My fiancé and I have worked at a bakery that is currently owned by her aunt for the past 5 years. The bakery has been in business a total of 9 years this upcoming August. It has a well established name and customer base in our town. She is in her late 60's and is ready to retire. She has offered to sell us the business which doesn't include the building (it's a lease) for $25,000. What are the first steps/documents I need to seek funding? **Also the business brings in roughly $150,000 a year total sales.