Hi, You will need to address toileting issues somehow. If a condom cath works for you go for it. Just remember things need to flow downhill otherwise you have a mess. In your reservation....there should be an area to request assistance. If you dont see it call the airline. They will help simetimes in getting into and out of the seat but not with toileting.
If you can afford to upgrade to the beds I would. It may give your husband more comfort and you may be able to catch a nap. I would recommend having a change of clothes on hand also.