Re: Foundation needs replacing, anything to stabilize in the meantime?
Those questions would be better asked with the structural engineer that performed the evaluation for you ... since they would be aware of what currently exists as far as loads , soil , etc.
While something like 2x8 framed walls under the home may have enough strength there has to be a sound footing for carrying the load.
As for gunite .... if it was approved it would be an expensive temporary measure.
There's no way anyone really could advise you site unseen over the internet.
Just a thought.
"" an ounce of perception -- a pound of obscure "