I get the reasons for the sideways mounting, but it's still hard to get used to. :laughing:It's not an attraction to sideways panels buzz, it's the rules!
We can't run branch circuits through the main end of the panel.
Our mains are inside the house not outside like a lot of yours.
Not to mention I very rarely have to add to wires in order to get them in panel.
If it was mounted vertical I would have to add to most.
So, why all the mini breakers? And do you make the connections to the service drop, or does your poco do it? Copper or aluminum service conductors in the PVC?