Those are all 20 gallon kettles, and there was just 2 inches of free board in the mlt while recirculating. Pre-boil volume is 14 gallons so there's plenty of room in the boil kettle, but yeah, your mash tun isn't going to get there.
That said, I brew one of these for like 10 batches of pales/ipas/neipas/wheats. At 11% abv (minimum - I've had it finish at 1.018 which puts it close to 12%) I have just a short pour every evening to knock my @ss into bed. You might consider doing a smaller batch to enjoy rather than not doing a batch at all
Cheers!