Help me figure out what to do career-wise....

Do you think you would be up to teaching at a private tutoring place, like Huntington or Mathnasium? Or, do private tutoring?

I would explore continuing to market yourself for the homeschool teaching like you’ve been doing. I think it sounds like you’ve got a natural business happening there already.

This plus one on one tutoring, most around here charge $40-60 an hour. My friend meets her students at the public library.

Yes I understood what she was doing. I mentioned tutoring because it is a lot easier finding a free place to tutor 1 person than a private space that can hold 10 people. And she would still be making more per hour. This could also expand her customers to kids who are in traditional schools. If the classroom works out she could teach homeschoolers during the day and tutor in the afternoons.

Sub pay varies widely by area. It is worth a look. My district pays $110 a day. I love subbing and don't find it stressful at all. But again YMMV. Since OP has experience working with kids and teaching it could be a good fit.

I believe it varies by state.

1. His triggers should be handled by seeking therapy, not by trying to force you into situations not in your best interest. Why are his triggers more important than your health?

2. I do want to dissuade you from thinking that retail is an option for you.

   -- Retail today is almost always quite stressful and that is not good for someone with MS.  The pressure for speed or selling credit cards or getting good survey scores or multitasking by stocking/doing go-backs is unrelenting and growing constantly. The pay is crap and the hours are variable so your paycheck can range from $50-250/weekly and you will never know from week to week what it will be. The customers are often difficult. All of that is stressful.
   -- I have yet to see a retail job that does not require the capability of picking up 20 pounds. Some require the ability to pick up 50 pounds. It also requires the ability to stand for lengthy periods of time.
   -- Retail is a terrible job for someone with health problems or limitations. It is an unforgiving business that does not generally give any leeway for health issues/absences. Even if there is some leeway, it is limited and/or will inevitably lead to limited hours or termination.
   -- The hours are almost always variable and it is common that you may have 20 hours one week and 4 hours the next. There is no guaranteed number of hours any most stores.
  -- Most stores require open or nearly open availability, including nights and weekends. When I was scheduling, as much as I tried to be accommodating, the corporate rules were that every part timer HAD to work every Saturday unless a time off request was submitted and approved (and it was never approved for more than one Saturday per month and NEVER during December). 

We had one on one tutoring for my son...paid $40 a session, twice a week. Also met at the library.  She was worth every penny!!

^^^ THAT! I haven't read anything else yet, but this stuck out to me. I was figuring something like $15 per HOUR, not $15 per student. (or do you mean $15 per hour? that is at least better... but still, could probably be more.)