Raising the whole thing would have been nice, but the "wings" so to speak off the kitchen are on slabs. And it would be cost prohibitive. I've already done about 80% of the wiring and have the plumbing planned and none of it goes under. We even had a guy do a superb job of putting in a high efficiency heat pump/furnace/ac unit with full duct work with minimal hassles. I hadn't even planned for this floor fiasco, but we opened it up to level it and found the joists in a bad way. My preliminary plan for the center support is to dig out the loose dirt and get to some solid ground and lay down a PT 6x6 and block up on top of that. I don't think pouring concrete is possible. I'm on a bit of a time crunch and winter is moving in here fast. I figger if what was there lasted 135 years, then anything I do will out last me for sure. And we plan for this to be the last stop.
thanks for your reply and input,