Lori, if there is one common thread that runs through the progression of this type of illness, is that there is no way to anticipate the speed of progression. Many neurologists will not speculate either.
Although your hubby did not get such great test results, you were not expecting him to, really, and if nothing had shown up, not only would you have had frustrations (and questioned those in charge of the tests), but you would not have had guidance with what to do now. as far as safe eating practices, etc.
The change in seasons might make this a little easier on you to get him accustomed, as its a time when almost everyone is eating more soups and less corn on the cob and grilled meats, etc.
I think it was good news that they did not feel liquids were a concern for him at present time. Not only is that good for safety and his health, but for him to get a change to become more acclimated to other changes.
It sounds like you're going to get lots of support on here for the meal planning ~ C J, all I can say is "yum!" to the cornbread and pot liquor, I grew up in the south, well Florida is not south, but with "Southern" relatives, and southern style cooking , I hadn't thought of that in so long
Another positive impact following this kind of diet early is that it will save his energy in those muscles. He won't tire them needlessly, whether or not he would be choking. Not tiring is good.
I hope you learn more about the pulmonary function, its a good sign that they didn't suggest that he needed special support or medications before his next doctor visit.
Andy is a lucky man to have someoine that so clearly loves him and is willing to make the effort to learn about what is needed to help keep him safe and healthy as possible.
good luck to you and your family.