re: Need advice for parents (Long OP, Beware)

I would just leave it alone. They have no debt and will be getting a pension and social security. That should easily cover their needs the way they spend money.

If they get in a bind, they have a few hundred thousand dollars set aside or could possibly sell some of the 2000 acres.

Their strategy is far from optimal but should suffice given their views towards spending and saving. If they choose peace of mind in their way of doing things versus the chance to earn more money that they won't use anyway, then I wouldn't lose any sleep over it.

It should be a great feeling to have them in such a good position approaching retirement. You should congratulate them on their hard work and discipline over the years and that they will not need to stress about money during retirement.