Golfer,
Prepare a "net worth" statement. List all of your assets, liabilities and income. If you have a business make sure you have a good set of financial statements...prefferably audited, but that is not absolutely necessary.
Then based on this information stop and think "Would I lend me money?"
What is your credit history like?
How old are you?
Is there someone willing to "co-sign" the loan.
Is $25,000 enough? If you are going to borrow money make sure you aren't totally cash poor after buying the plane. This will turn an exciting purchase into a financial burden quickly if you don't plan ahead. You will need insurance, maintenance costs for a year or two, gas money, hanger storage etc, etc. Borrow more and extend the payback period if the monthly payment is too high.
As to insurance....check your life insurance out too...there are some issues you need to address there when you buy a plane, such as: Do you need more coverage, do you need to notify your existing insurers of this purchase, will your rates rise as a result, if you do not tell them and are killed or injured in an accident will your next of kin be refused payment because of the witholding of the purcahse?
That's all I can think of for now.
GL