Talk with your local banker to find out his requirements, thoughts, and if he would even loan out the money on it. He'll have plenty of questions for you. To be prepared to answer some of his questions I would talk with the realtor the property is listed through.
You will want to the following:
Income and expense reports for at least the last 3 years on the property
Current lease information, (years, payment, termination policy, space, improvements, utilities)
Age of all major items (roof, ac, furnace, etc)
If possible the occupancy rate for the property over the last 3 or more years
Having that info should help make your meeting with a lender go smoother and put a little more faith in them that you know what your are doing.