It isn't the bed as much as the mattress that is important for comfort and preventing pressure sores!
That said, the pro's of a hospital bed are:
They have the advantage of raising the entire bed higher, not just the head and knees. Early on that is very helpful in helping a patient get out of bed without lifting help especially when the bed has side rails. Later, raising the bed is important in reducing back pain for caregivers when turning, bathing, etc. a patient in bed. That is really important for small caregiver/large patient situations!
Many non-hospital adjustable beds are too low to the floor to get a Hoyer or similar lift underneath.
Insurance/Medicare covers a hospital bed although you may have to arrange to pay the extra cost of electric over manual cranking. Other adjustable beds are not covered.
Hospital beds are available through free medical equipment loan closets, other adjustable beds are not.
Used hospital beds are easy to find locally and generally economically priced on Craig's List and Facebook Marketplace. They usually have not been used long term so are in good condition.
New or used bedframe, you will want a different mattress. A new hospital bed comes with a lousy mattress so buy just the bed. You will need a medical pressure relief mattress or air overlay at some point anyway. If you want to put off buying that, a standard twin mattress works fine on a hospital bed. An extra long is only needed for tall people.
Cons: Not sleeping in the same bed is hard for most couples to accept. A second twin bed can be put against the hospital bed with the height of the hospital bed adjusted to match. There are foam mattress gap wedges that are made specifically to fill and smooth the gap between the mattresses.
Hospital beds are not great looking furniture. You can just suck it up and be realistic or you can buy a nice looking headboard/footboard wood cover and nightstand from
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