Ryzen 5000 cpus are extremely cheap right now. I bought a 5900xt (16 cores) to upgrade a server a few weeks ago for ~$250. If you already have DDR4 you could put together a system for pretty cheap if you need it soon.
The downside is that AM4 is basically EOL, so no upgrade path.
The downside is that AM4 is basically EOL, so no upgrade path.