There must be a way to glue a LCD display to the lid and run a LVDS connection back into the system, wireless mouse and keyboardI think there is also a shift to notebooks in the industry this year given the move to remote work.
Battery power will be a little harder
I've updated above chart
Added lowest pricing as per Ebay
Pricing is for a system with Buynow and complete with CPU/RAM/Drive
Again for Lenovo's only
The Patient should be able to do better than those prices, also if you have spare parts again you can do better
Added P340 as well for 10th Gen happiness