Wow. I dont think OP’s livelyhood depends on this choice. If it did he’d know the costs etc. He probably just want advice as an enthusiast. Well Im hoping anyways.
I’ve own/ owned hardware from all of your suggestions. The cheapest option is the windows route. For hardware support I’d pick Mesh – ime when my workstations overheated and they fixed it quicker than I’d ever get to complain about.
My Dell laptops failed with a “recall” problem – but they only recalled personal customers stuff and told business customers to **** off (uk consumer law etc) and I had to pay £400 for each laptop to sort Dells cooling design problem. Never again.
The Macs are great but are more expensive for software and they still break. The main difference is that there’s less for you to mess with (which is probably a good thing).
Mac screens are good. But the ones on cheaper machines are just ok. A good monitor is expensive. Either ways.
To stop trojans on windows make sure everyone (even you) has a “user” account for day to day work. Not “administrator”. Ever.
If anything tries to install itself you get major warnings (passwords etc). Since I did that I’ve not had one problem.