Do you dream of being repeatedly kicked in the nads? Fuck no, and neither do I
Working with Windows professionally has always been something secondary to my primary career goals, namely working with some sort of UNIX (which, through macOS and Linux, has kinda worked out). Doing frontline desktop support with WfWG 3.11 through Windows 95, Win95OSR2, OSR2.1, Windows 98 and eventually Windows 2000 was just a means to an end, and an experience in and of itself.
This was part of my point, perhaps not artfully articulated. When Vista goes EOL, it won't be a ZOMG COMPUTER NO WORK ANY MORE WHY IT BURNING DOWN MY HOME LOL YOLO situation. Just get it replaced when practical and affordable.
Again, I would avoid a "low cost" laptop with a shit APU on board, as it'll bite you in the arse down the line.
1) This, but for varying values of "cheap".
2) The lack of a manufacturer's warranty may be an issue here, but kit built for the enterprise tends to last longer than lower cost, lower margin consumer gear. Morgan Computers, for example, have some great bits of kit which are, while most likely incompatible with Windows 10, fucking bulletproof. However, I raise again the point that some sort of upgrade may be required down the line to upgrade from the inevitably pre-loaded Windows 7 when it goes EOL in 3 years.
3) I rarely recommend this option for anyone who is likely to ever want to use a major software package which is usually unavailable for Linux. You also massively reduce the support options from "almost any computer repair store in the country, and beyond" to "that lovely nephew who recommended this computer to me".