Dark_art_: I've just came across a youtube video with some pretty decent content on the subject.
While is not my style of information, it does have a point.
https://www.youtube.com/watch?v=wF8EuEfKH3Q For those who prefer not to open youtube, some "youtuber" paired a AMD Ryzen 3600 with a A320 board (Gigabyte A320M-H) and it worked just fine. It's pretty much one of the cheapest Ryzen boards I can find in my country.
It has some drawbacks but it worked pretty good for gaming.
While I woudln't choose this board, I am not a fan of choosing a high-end board for gaming builds, specifically with CPU's that will not be overclocked (most newer Ryzen stuff there is no point to OC).
There are a lot of "features" on higher end boards that may never be used, some of them are even detrimental to performance, like those advertised huge, anti-efficiency VRM's (let's call them that way). They usually don't come in mini-ATX as well.
While is not my point that we all should run the cheapest board we can find, it may open some options for people like the OP, who just want to build a gaming PC. Most "internet" information is to buy a big board, with big VRM and it's not allways the best choice, I guess it's pretty much like asking a hardware question in a random forum where the answer is invariable Get a new PC!
My advice in getting a Gigabyte x570 Aorus Elite which should be $250, comes for the following thinking: when I buy a platform, I intend on having it usable for the next 10 years. At one point during that time, things will start dragging down the platform, CPU/GPU/SSD/RAM. It's better to have a stable motherboard/PSU which will allow you the equip an end of life CPU(zen2+) later on, than buying a cheaper motherboard, only to discover that it might end up not supporting future(but same socket) CPUs, because the manufacturer cut some costs.
For example, the older 300 and 400 motherboards have a smaller, 16MB EEPROM chip for BIOS, in order to cut down on costs. And it turns out that 16MB is "barely enough"/"too small" to add support for Ryzen 3000 CPUs. So now the motherboard manufacturers are cutting BIOS features, in order to get Ryzen 3000 CPUs to work on those
motherboards. Who knows what's going to happen when Ryzen 4000 gets launched.