DIY Latex mattress for stomach sleepers

Hello long time first time,
My partner and I are looking at DIY latex mattresses for health and financial reasons. Being both teachers does not make things easy and would like a mattress that has a longer life span.
My partner and I wake up with sore and knotted backs on an older plush coil mattress. We are both primarily stomach sleepers. Both height and weight close to 5’5" and 185lbs.
What would a good configuration be for making a king size mattress?

Thank you for your interest in our products. I would start with our Combi Zone pocket coil. This has extra support in the middle for stomach sleepers. I would also add a 3" Medium Talalay or Dunlop topper for your comfort layer and finish it off with our 11" Bamboo zippered cover. Let me know your thoughts on this recommendation.

Thank you for helping. What is the compare contract of the coils to an all latex core?

My pleasure