I'm looking for a small form factor PC (or just any cheap PC) to use for a classroom. It will only be used to show documents, and browse the web, show videos and maybe occasionally to show some basic python programs. The only display will be a projector (which uses VGA, but I can get an adapter if needed).

Currently looking at the Asus VIVO Pc VM42, or Asus VIVO Pc UN45. Any reviews or suggestion will be appreciated, as these contain integrated parts so i can't really judge, and i don't know if anyone has used these.

Or any other small PC, or cheap build recommendation is appreciated. Budget is around 13k . Also suggest where I can buy the PC/parts for reasonable price(s).