I am a 29 years old, recently married, looking to complete the JMT this year as well. I predict about in the same length of time. I had originally planned on going with my usual backpacking partner, my brother, but since he is 10 years younger than me, he is not that dedicated yet.... maybe in a few years!
I live Long Beach and in IT. I have backpacked for about 20 years off and on, but over the past 6 years have managed to catch a few trips a year to the Sierras (mostly Mineral King area).
Let me know if you are interested. Good luck!