My parents paid theirs off when I was 13. I remember that because I was in 8th grade, and my parents had a dinner at our house with only my God parents and those SUPER close to us. (my family is really big, so normally a party turns into >45 people really quick!). When I asked about it, while dessert was being plated, I asked why everyone was over, and my dad explained motrgages to me. He explained how they (my parents) had worked very hard to pay it off, and that the people that were there had all worked hard with them - they had loaned them money for the down payment (my parents got screwed out of another house and didn't have a down payment - all of their friends pooled their money together and loaned/gave them a down payment - THOSE are real friends!), watched me and my sister between shift changes, or so my dad could study when he was finishing up his masters (on a full ride at Notre Dame) so that my parents didn't have to pay sitters, shuttled me and my sister to/from school practices, etc, when my parents were working overtime, that kind of thing. For my parents and their culture, they didn't do it on their own, and just having everyone over for a nice dinner and acknowledging everyones efforts was enough. Over dessert, we talked about the things we could do with the next mortgage payment (which was a family budget vacation to Macinac Island - my parents ended up paying the whole hotel bill for all their friends & their families who came too - it was a bed and breakfast - SUCH a great vacation!!!) and the crazy things we'd done over the years to save a buck.
The one weird and crazy thing we still talk about - driving down to WDW. On the way home, we got caught in a BLIZZARD and had to stop for a full day because they shut down the highway where we were. We were still far enough south that they didn't have snow plows, and we slept in the van.
Whatever you decide, congratulations to you, OP on your accomplishment. I'm sure that what started out as a huge sacrifice probably became habit, and finally paying off that mortgage is a sure sign of the changes you've made in your lifestyle to accomplish a terrific goal. It is cause for celebration - reaching that goal!