Sorry for your husband's continued issues. Maybe try a food buffet to see what he likes, it's easier, and cheaper. ChristineB has a "easy to eat" food listing, and another post for cookbooks has several cookbooks geared for eating disorders. which is down in the listing of topics. There are plenty of soups that can be made, pur�ed vegetables, pasta's, beef, chicken or seafood dishes in light sauces, basically unlmited. Even using an oil mister helps. I have a small "Misto" can that I put oil in, usually extra virgin olive oil. Pump it, and sprays. You can spray that on any food to help swallow. What are your husbands food tastes likes and dislikes, and what types he has difficulties with? Is he eating everything by mouth?
There are ways to increase saliva too. Drinking lemon water before eating, smelling lemons, chewing gum. Milk replicates saliva's consistency, so drinking just may help. The lactic acid burned my mouth. Sugar also helps produce saliva, so maybe a lemonade drink before, during meals, but sugar burned my mouth too during, soon after treatment, but eat everything now.
Last week I made a Texas style chili with ground beef, and small chuck beef (fatter cuts is easier to swallow) then a bolognese sauce for pasta, which both are easy to swallow, at least for me.
I would also suggest seeing a speech and swallow therapist at your treatment center, who can help with mouth exercises, and order a modified barium swallow test, if needed, to see what is the problem with hs swallowing ability.
I hope this helps, any questions, just ask.