The most affordable life insurance is term life insurance because term provides temporary life insurance for a certain period of time, usually for 10 to 20 years, or until you reach age 65 or 70.
Since term life insurance is pure life insurance protection it does not build up any cash value inside the policy.
Whereas, whole life insurance provide lifetime coverage and may build cash value inside the policy over time.
To find the most affordable term life insurance you can compare rates and plans online among several highly-rated insurers.
Also, keep in mind, the younger you are the lower your rate for life insurance because you are expected to live longer. That's why you may lock-in a lower rate if you buy life insurance now, while you are young.
In addition, the shorter the term, or duration of the policy, the lower the rate. For instance, a 10 year term life policy will have a lower rate than a 20 year term life plan.
Other ways to lower your rate for life insurance include being healthy, not smoking, having a height-to-weight ratio that is in the normal range, and being a safe driver, among other things.
Here's an article that provides affordable term life insurance information to help you find low cost life insurance coverage.