Hi RandiLynne, I'm so sorry you're in this boat with us. I wanted to respond to your question because in my experience, anything you can do to create memories together, especially if/while your PALS is able to function at a pretty high level, is precious and you'll never regret it.
My husband was diagnosed just as the pandemic hit, so his most able months were spent on lockdown, very frustrating. Our kids live far away and he couldn't even see them for months after his diagnosis. Eventually we rented a small RV and spent a whole month driving across country and back, visiting kids, friends, and family along the way, seeing gorgeous national parks, listening to audiobooks and fun music together - it was one of the best trips of our life. We stayed safe in our little bubble, no restaurants or hotels, had dinner with our friends in their back yards while sleeping in our RV in their driveway - and our kids quarantined for two weeks before we arrived so we could be together with them. Memorable, and totally exhausting for me - I did all 6,200 miles of driving, all the RV hookups, meal prep, packing and unpacking the RV, getting Steve dressed and fed - but I would do it over again in a heartbeat.
I had accumulated enough vacation time to be able to take the time, and then I went to part-time work when we got back. And then several months later I had to stop working to manage PALS' needs, which broke my heart as I was not ready to retire. I'm a little worried about the future financially since I had planned a few more years in the workforce, but I just decided in the grand scheme of things, having special time with my husband was top priority and I'll figure things out as I go.
I have nothing to add to the good financial advice everyone has given, but I just wanted to encourage you to find a way to maximize the time you can spend together, and special ways to spend it, if at all possible. For me I think it'll help me have fewer regrets.