Good beds are well worth the trade off imo. But if you want to experiment I know some people use gym mats similar to those used in mixed martial arts or gymnastic gyms.
Discussion
Interesting idea. Recently upgraded from a queen to a king, but my sleep has been terrible since the queen was a stiff spring, and the king is a 'firm' foam. So need to find a solution.
Temperpedics are 👌🏼 very expensive but they usually give you a line of credit with 0% for 2-3 years. Worth give you’ll spend a third of your life sleeping.
No mattress sometimes is better than a bad mattress