Hi Ruler2112,
the better options and possibilities I’m aware of that are within a reasonable distance of you are listed in post # 3 here. Some of these will require some further phone calls and research to find out what types of mattresses they have on their floor and to make sure they are transparent about the materials in their mattresses but you have some reasonable choices relatively close to you.
Other lists that are further away from you include the Grand Rapids area in post #273 here and the Detroit list in post #2 here but I don’t think you will need to travel that far.
Unfortunately there’s not much you can do about the body you were born with and your sleeping style is partly dictated by your size as well. The best suggestion would perhaps be to consider a California King size mattress which is 72" x 84" and would allow you to sleep more straight up and down. Beyond that … it’s more a matter of using higher quality materials in your mattress (especially in the upper comfort layers) that are more durable and can do a better job of withstanding the greater stress you put on them.
Not if the mattress uses higher quality materials and components that are appropriate for your weight and sleeping style. Lower quality materials can soften and break down much faster … even for people with much lower weights. The weak link of most mattresses is in the upper layers and this is where it’s most important to use durable materials.
Yes this is very true although some people have a larger surface area or sleep in “flatter” positions so the weight that comes in contact with the mattress is spread out over a larger surface area. Someone over 400 lbs would be very hard on a mattress regardless of how they slept and would have to pay particular attention to using good quality materials.
No … the range of pressure relief or alignment that you are sensitive to is more of a medical or physiological issue. From the perspective of buying a mattress the best you could do is make sure that you do some careful and objective testing to make sure you are in good alignment on your mattress in all your sleeping positions. The kind of guidance that can help you with this is where an experienced retailer or manufacturer can be one of the most important parts of a mattress purchase. I would focus more on materials that soften less and are more durable than on trying to change your physiology (outside of course of the guidance of a health professional for helping with any health or back related issues that could affect your mattress choice).
I would choose a mattress that suits you in other words instead of trying to force your body suit the mattress.
A King size is the same length as a queen just wider so it may not make a lot of difference but a California King is 4" longer and would probably make a difference yes.
Yes … this or a topper than can be replaced is certainly a flexible design and allows you to replace a layer instead of a whole mattress. Some local manufacturers will also replace just a single layer and rebuild a mattress.even though you would need to take it to them to have it done.
I don’t think I would take this to the length of cutting it in quarters but the half and half layering would make some sense yes. I don’t think in real life you would double or quadruple the life of the mattress but you could certainly extend it if you slept more in the middle of your mattress.
This can also work well but you would need good quality springs for your weight and I would only do this with a mattress that used minimal amounts of polyfoam. If this is done right it can be a very good design. I know a manufacturer who designed a line of mattresses (including latex) that have several different firm mattress base options (that are all flippable) and then offers a series of toppers for a comfort layer that can also be flipped and none of them have any “junk” foam in them at all.
In “theory” yes or at least possibly … but all theory needs to be confirmed in practice with your own personal testing.
It will make more of a difference in how you feel in the morning (with or without back pain or discomfort) if they help you sleep in better alignment. Most of the initial feel on a mattress comes from the upper layers not the base layers. There’s more about this in the basic information post I linked earlier.
You can read more about suitable foundation for an all latex mattress in the foundation thread here but the ideal choice IMO is a slatted rigid base which allows the mattress to ventilate better with slats no more than 3" apart to prevent the very elastic latex from sinking into the gaps over time. You can also read more of my thoughts about solid surface beds in post #10 here.
Hopefully this has helped … but I would focus for now on doing a little more reading from the first post I linked (which will probably answer more of your questions) and then it’s time to do a bit of phone research into your better local options and test some mattresses
Phoenix