Something like this: https://interiorresourcesusa.com/product/bristol-twin-adjustable-height-bed/.:
I did a bunch of looking up for “height adjustable bed frames” but didn’t find anything like this. Where or how do I look for such frames?
Hi Oneechan69.
Welcome back to the Mattress Forum! 
Hmm this is sure an interesting type of frame. I did a search for “adjustable height bed” and it did yield some results but nothing wildly different from what you shared here.
What are you hoping to achieve with this style frame?
NikkiTMU
I actually couldn’t find many bed frames like this one with lots of googling. I just want to be able to change the bed height at any time later.
Can you share terms & links of searches that worked for you?