I have used my local bank and also have gone through AOPA. Local bank is easy if they do aircraft loans, most do not. AOPA is fine, but there are plenty of hoops to jump through. One of the easiest ways would be to tap into a home equity loan if you already have one.
Pete
Pete Burns
Happy owner of a 1946 Aeronca Champ 7AC
Sad ex owner of a 1967 150G
North Creek, NY 0NY0 (Bennett's Field)
States I have landed the 150 and or The Champ