As a finance brand, even unrelated to jets, I believe the non-plural of this would hold some weight. For plural, I have a slightly harder time with it, IMO. The one would be just "jet finance". The business of financing jets is quite specialist with a narrow buying pool. The non plural as mentioned could mean any kind of finance (just comes across as a nice finance brand). If you can do some successful outbound on it, power to you. Take offers on it...I'm happy to be wrong