Hello @Dan_W 
Welcome to DevKinsta community!
Really nice computer specs you have there! 
and that should more than enough to run DevKinsta, and the site page load should not that slow (30 seconds to run)!
Could you please also tell, what Windows O/S version you’re running on your computer?
I have another spare computer (intel core i7 Gen-3 with 16GB RAM) runs on Windows 10 Pro version, and I installed DevKinsta and Docker (but I didn’t enable WSL 2 engine there, and only use Hyper-V). I installed fresh WP site locally there, and its site pages loaded almost instantly.
If you’re on Windows 10 Pro, then maybe try to disable/un-check WSL2 on your docker desktop (General) settings as suggested here .
Cheers,
Agus