Thank you, erwin, (I write it as you do, with an e instead of an E).
When I activated the Hair the first time, everything stopped. (M1 Max)
So I dialed it down. Switch the Dynamics (Hair) off for initial tests.
Caching will store only the Guides, not the Hair. Hair, in this case, is the interpolation among all the Guides. So, Caching helps, but not that much.
If you can live without Dynamic and Redshift for this, you can use Fur, which was created for that effect, to cover large furry areas.
All the best
P.S.: You never bother, if that was even meant in a serious way. Please feel always free to ask.