One thing was not clear was what your housing plans are now that you have sold your house. If you might need the money in a few years to buy a different property that would need to be build into your plans since money that will be needed soon should be invested less aggressively.
Your costs of $60K a year might be low if that does not include income taxes. If you will be paying rent in a high cost of living area that will also make it harder to stay within your $60K budget.
Sorry to hear about the health issues but even if you did not have those you should also crunch your numbers three ways, as a couple and as if one of you survives the other.