Post and beam spread footings and future plans
So if I go ahead with the post and beam configuration with the spread footings, later when I do a foundation wall around the perimeter I'd have to support the beams with some sort of temporary structure (such as perhaps each post gets replaced by a mini-beam supported on each end so the mini-beam can bridge the excavation and rest on ground that is far enough away from the excavation that it won't collapse?) so the posts and footings could be removed for the excavation? Or something along those lines?
I mean... it's not as important the particulars of how it can be done, rather the question is that a work-around is needed but work-arounds exist?
Heck, I might need to watch how the post and beam project turns out, it's possible I might get a good result and leave well enough alone. Now that I've worked with the house, I think I'm learning that some of the uneven floor issues aren't sag, bend or warp related but... for example, the kitchen floor rotted out and was replaced with new 2x6 joists (where the original lumber was 2x6 that was actually 2" x 6") and on top of that was placed a layer of 2x6 boards, over which was placed another layer of 2x6, over which was placed a layer of plywood, over which there was yet another layer of plywood.
On the other hand, there are some legitimate crowning issues, which I think is actually an area where the house is jacked up too much unless the entire remainder of the house happenned to drop uniformly.