I have a non-registered Saneen that I took on a few months back and milk her by hand each day. She's a dream to milk with the laid back attitude that Saneens are well known for. In fact, I can milk her with or without food. I've recently been told this is quite unusual and normally it's "no food = no milk". I'm sure there are others like her though
Munchie (sorry, kids named her!) has an acre of hill to browse (short grass, trees and stinging nettles) with her half-sister and a field shelter for the weather. Whilst she's never show white, she doesn't get mucky and dirty - even when the pigs escape into their field
However, I do have a normal routine of hay whilst milking with concentrates after, at which point I give her a quick brush over whilst she's eating.
Her milk is delicous with no taint issues and I comfortably get over three litres every day from her. Whilst others running a commercial enterprise might be aiming for more, you would probably find this more that enough for your initial plans.
Depending on how commercial you're thinking of getting, I would suggest, as one newcomer to goats to another, that attitude and ease of milking is most important for your first couple of girls. Once you've got the hang of everything, then worry more about butterfat contents and increased yields.
As I've said, I'm new to this too but thought my experiences might be useful.