boot from phone, or even better, all pcs should have the ability to enter a web address and have internet access so that you can enter the address for some basic os function where it then downloads enough of the os you link it to that will allow you to then start the full installation process.
so you may boot up, it then asks for the address, i'd enter
www.microsoft.com/win10install
and that's it. it'll get the files needed directly from there to get things going. i guess the biggest issue would be internet access? i assume this would be programmed onto the motherboard to work, and it'd hopefully only need say 250mb internal storage for the files you'd need to get started, unless the motherboard would be able to access the hard drive too?