We financed all three times on direct so we could pay it off and get CC miles/points. The first time you do it, they don't do a hard pull on credit, IIRC, so no dings to your score or anything, and you get the crappier rate because you're an unknown risk.
Subsequent to that, financing DVC is ridiculous, LOL. You qualify for the lower rates because your other contract was successfully paid off and you're a known quantity, and you're approved immediately with points loaded before the phone call is over.
All the documents are sent via email with an option to do an online notary scheduled at your convenience. If you and your partner/family member are both owners on the deeds, you both need to appear on the notary call. I think you can set up separate notary calls if your schedules don't mesh to do it all at once together, but we did it at the same time.
No prepayment penalty, you can charge off the whole thing in chunks and pay it off however you'd like. We did a couple $10k charges at a clip over a week and kept paying it off as soon as they hit the CC, repeat and rinse. If you can use the Disney CC (we don't have/use that one,) you can extend the payments out six months interest free, I think?