Fiber is not so expensive unless you are getting fleeced. Indeed, it can be cheaper than copper cabling. It's also the right solution to long runs.

Given the installation costs, it's likewise foolish to install 5e rather than 6A at this date and into the future for copper. With 6A your inter-switch links can run at 10Gb, even if your drops are only running at 1Gb. But your inter-switch links should really be fiber.

If you are stuck with a penny-wise, pound-foolish corporate mindset, drop in a switch every 100 meters or less. Throughput from [everything on a switch] is going to be limited by what the switch uplink speed is, to the extent that more than one thing on a switch wants to pass data up or down the uplink.

Commenting on topology without some sort of sketch of the building and knowledge of what other PWPF limitations on common sense are in effect is shooting in the dark.