MJ, you are all into software with the approach of teaching and helping people and perhaps selling a copy or two of the software.
Perhaps it is time for you to go over to the "Dark Side"?
I am in a similar situation except I got cut off at the knees at age 70. That leads to very uncomfortable feelings.
What I am trying to do now is to open my own business teaching, installation, configuration, customization plus drafting on the side and now selling the software. I work out of my "home office".
The aforesaid "Dark Side" is Carlson software. I push the AutoCAD Embedded version. It's a slow start, but I can see it coming together.
Email Scott Griffin at sgriffin@carlsonsw.com and see what he has to offer. They have offered me a honey deal on software sales and I get to do all the training I want with the people I sell the software to.
If you think it may help. you can use me as a reference. Tell Scott I sent you.