My first suggestion (I'll think on this more, but I'm just responding immediately this morning after reading), is consulting.
I would say build a profile that allows you to consult with people doing work in the fields/areas where you know you have expertise - and make it available online via Skype and Email so you don't have to travel. This can be anything from providing project feedback, reviewing documentation, guidance (especially for young people/college students studying in your areas of expertise), giving feedback/recommendations for presentations, etc.
The important thing is for you to have the flexibility to work from home and not exert yourself too much, while using what you've got as far as knowledge, experience and analytical thinking.
I don't know enough about your specific areas of education/knowledge to give any more specific advice, but in general, consulting is a low-overhead way to use what you've got on your own terms.
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My first suggestion (I'll think on this more, but I'm just responding immediately this morning after reading), is consulting.
I would say build a profile that allows you to consult with people doing work in the fields/areas where you know you have expertise - and make it available online via Skype and Email so you don't have to travel. This can be anything from providing project feedback, reviewing documentation, guidance (especially for young people/college students studying in your areas of expertise), giving feedback/recommendations for presentations, etc.
The important thing is for you to have the flexibility to work from home and not exert yourself too much, while using what you've got as far as knowledge, experience and analytical thinking.
I don't know enough about your specific areas of education/knowledge to give any more specific advice, but in general, consulting is a low-overhead way to use what you've got on your own terms.