I'm 38, 2 kids, and a wife that races, and I also try and run a team, as well as full time job and typical Dad duties. Anyways, I feel you with the whole training time thing but you know what, in CX you can make so much time up by being technically sound and smooth. Half a second every corner, second on a barrier section and maybe even more by hitting good lines in technical areas. It all adds up and doesn't require any more power from you, just less brakes and good handling.
If you want an even easier bike to maintain then go with a single speed out the back.
Aluminum SSCX with canti's and tubular wheels can be pretty fast low maintenance bike and had used for like, I don't know, $600? Get an all around tread for the Tubies and then maybe another set of tubeless wheels to swap for super dry or super muddy (file tread and something like the BOS). Winning.
Way to get out there! Great pics! Cheers!