With the Chrismas/New Year slowdown, I'm not really sure how things might change regarding backlogs.
Workhorse pits is still probably in the 2 to 3 month range. Primitive Pits has two time frames, one for urgent deliveries which I guess are commercial deliveries and a second list for others. The second list was ~11 months out when I checked back in November.
Workhorse Pits are undergoing some enhancements so, delivery time-frames may be changing. I also had the impression they might be trying to add some welders so, delays may or may not be changing for better or worse.
With popular builders with long lead times like (no offense intended and just a few examples out of many good pit builders) Moberg, Shirley Fabrication, Evie Mae, etc., I'd be pretty reserved committing my money and waiting for their product to built.
Why? I sold custom knives, ordered a few, and sold custom 1911's. First, there is the customer that doesn't have their new 'toy' for two or three years and might die or have a serious medical issue that won't let them enjoy their new acquisition when it arrives. Then there is the maker who might die, have a wife come down with cancer, have a stroke, etc. as well. I had a custom knifemaker die during the process of making my first truly custom knife, personal first-hand experience here. Customers get divorced, die, lose their job, have children, etc. and for unforeseen reasons can't take delivery too. If you want that custom 1911, knife or, pit, be sure you will be available to take delivery and enjoy it before committing to the order! If it is a long way out, what will 'pinch hit' until then?
This is a major part of the reason I didn't wait on an Evie Mae pit. My second option would have been a custom Shirley Fabrication but, again with a ~3-year delay, am I willing to wait? In the end, I picked up a SF on the secondary market with a modest drive to get it and, was ready to smoke a few days later. Now, I'm in a much better position to wait 1, 2 or, 3 years for my 'dream' pit to be built if I ever do commission something with a very long lead time in the future.
