Soft Floor Area - What to Do?

[TankerIP]

Well, I've finally decided my floor problem is fairly extensive. This was an existing problem from the previous owner. I've tried to contact him to learn the exact cause, but so far no answer. Nevertheless, I'm fairly certain there is no existing leak. We've had this trailer for almost 2 years, and I've never noticed a wet/moist spot in this area. Possibly the PO had a big storm that flooded the trailer (broken/open vent) with the water pooling at the rear end -- only a guess.

I'm in a dilemma about how to get this fixed. The diagram shows where I have noticed softness. Since the tanks are below the area, it's hard to be certain, but I think I have a good guess. Obviously, replacement will require complete removal of all the galley cabinetry, plumbing, the black water tank, and who knows what else.

I would like to get a guess of how much this might cost to have either an airstream dealer or the folks at Jackson Center to do the work. Has anyone had an experience of something this extensive?

We have used the trailer two years now, really trying to ignore the problem. It's been a lot of fun. But of course, the problem is always there in the back of our mind.

I have read many posts here where folks have done the replacements themselves, but the idea of having to pull out all the cabinetry and plumbing just seems daunting.

Any ideas, thoughts, suggestions would be welcome.