For those wanting to jump into Windows on ARM for a lower price, who do not mind running an IDE on a separate machine, Microsoft's original Windows ARM Devkit is still available from Microsoft, on eBay, for $219. It has a Qualcomm 7c which is not powerful at all (as shown in his graph as roughly similar to the "Dot 1"). But... if you don't want to spend $599, it's a fun few weekends.
https://www.ebay.com/itm/255784903190?