Late to this thread, and there are several wonderful suggestions already to your question.

I would like to add the following…

There is no single valuation that makes retirement possible. Figure out the comfortable income for your family when there is no source of revenue. Look at options to generate passive income for this amount. Keep good health and mitigate any potential losses.

You are in your mid-30’s, and still at the peak of your work life. With your finances structured to generate the necessary passive income, anything from your part-time work life and retirement plans are supplemental. Enjoy the process.