You know what my friend? You do what you can. You forgot to mention in that list that you usually end up helping out the installers as well - that's a big energy sucking event that you can't afford to do.

You can still do this, just cut it back and space it out a little more. People call you and use you because they love your work. If they have to wait an extra day or two...so be it. It's not worth your health. If you only work 3 hours a day, then that's what you do so that you can continue to do what you love. Remember, you're your own boss. It's not like you can get fired for not working 8 full hours every day!

You work much, much harder than you are giving yourself credit for. Give yourself a big pat on the back because many people without MS couldn't keep up with you. So slow down, relax, and take some time to have a little fun right now.