Glad we could help.
Thinking about longevity is a big deal and if you check out the message boards at The Babywearer (thebabywearer.com) you can usually find babywearing groups in your area.
I am very fortunate to be near a very active, very knowledgeable group with a decent-sized library of great carriers. They will let group members borrow them for a month with a nominal fee ($5) ... I borrowed a Boba over the summer and my nephew loved it!