The type of life insurance that offers the lowest rates per $1,000 of life insurance protection would be term life insurance.
The cheapest term life would be the plan that offers coverage for the shortest 'Term" (duration).
Term life offers coverage for a term of 10, 15, 20, 25 or 30 years usually. You may be able to find term life with a term of 5 years.
So, the most affordable term life policy would be a 5 or 10 year term life plan.
In addition, the way to find the most affordable policy for term life would be to comparison shop by requesting free term life insurance quotes online so you can compare the lowest pricing from multiple life insurers.
Here's how to learn more about finding an affordable spousal life insurance policy.