Advice for new build

We have a new building currently under construction and I need to purchase access switches and plan the cabling infrastructure. A contractor has been engaged to perform the physical work but I need to work with them as far as layouts and numbering schemes etc.

In an effort to prevent the patching from becoming a complete mess I would like to use 15cm patch cables and a rack layout of 24p panel-48p switch-24p panel-24p panel-48p switch etc and patch everything 1:1. Where this fails is every drop is a double but not every drop will have two things plugged in. Obviously it would be far too expensive to purchase enough switches to patch everything when up to half will never have anything plugged in.

What I’m thinking is to have every drop labeled as A and B. In the rack I would then have all the As at the top in the manner described above and patch all of those. Then have all the Bs at the panel just all in a big stack and purchase a single 48p switch for anything that needs to be connected on B.

Secondary to that is we only need minimal PoE and buying all PoE switches would also be prohibitively expensive. On each level there’s approximately 200 double network drops but only about 20 PoE devices (cameras and APs). The APs are also 2.5G so I’m thinking of just buying a single multi gig PoE switch as the switch connected to the B ports and have all the PoE go into that leaving all the other access switches to be non-PoE.

Does that make sense? Am I over complicating it? I’m just desperately wanting to avoid having our racks end up as a godawful mess.