Hi, take it or leave it because I’m not very knowledgeable but I did do something like this with my partner. We used a shelf mounting system like this: https://a.co/d/60pkQw2 although I am not sure which exact one we used. I can look if you’re interested.

We determined the location of the support beams, which mapped where we placed the vertical shelf supports. Drilling those into drywall anchors is not an option. Then, we determined the shelf lengths we’d need to fit the space we tried to fill. They sell numerous shelf lengths, so it was a puzzle of where we could support it, how long we wanted it, etc. We have a tv stand below the shelving for our entertainment center stuff and our TV. I’m happy to share more if it helps.

None of this works if you really want to build the whole thing. But, it is easier than doing so and relates to what other commenter have said, this one travels a bit easier because you can use any parts that do fit your next place (which I know isn’t important right now).

I like to drill holes in mine, it’s not always safe to do and you should run a bit of water where you intend to drill to stop the dust, but I’ve saved many pots that way