...I am also considering just purchasing two of the items I linked in the first post and running them in parallel. Any considerations/cautions I should be aware about if I decide to do that?
Load sharing is a tricky problem...you'd probably end up with one regulator bearing most of the load and probably being stressed.
I see lots of products bucking 24V down to 12V at 10A, and others boosting 12V to 24V at 10A...nothing yet in a buck/boost that will take ~24Vin and make 24Vout at 10A.
There are lots of companies like ADI and TI that make integrated buck/boost power modules that can handle your Vin/Vout/Iload, but you'd have to figure out how to heatsink them and make your pin connections...not trivial.
Wait....maybe this would work?? 150W is still less than you are asking for, but it's getting closer...https://www.amazon.com/DROK-Adjusta...;qid=1558543581&s=gateway&sr=8-3