I'm not sure about whether or not your descriptions of whole vrs term are the same here.

Term is least expensive here.

Whole is more money and less coverage. $50,000 sounded good 30 years ago, now you need at least $500k.

Never buy a policy that has a "Investment" option. Sucker polices in my opinion.

Term life is cheaper than "Term mortgage" insurance. That might be what your describing. Mortgage insurance is a no no. Up your term life (cheaper and conditions are more reasonable.

If your still working, consider LTD (Long-Term disability).
I bought it years ago and in 2009 I went on LTD for the rest of my life. Turned out to be a good investment.