Hi MLBW,
I do not really know the difference between "evaporated canned" and "powdered". Sorry. Karihome and Holle both come as powder that you mix with water like formula.
Does that help?
You can get Karihome 900g can for about HK$250
and Holle 400g pack for around HK$ 170
I did some calcs for you and the result is that 24oz of milk
cost HK$ 30 for Karihome and HK$ 47 for Holle. So you shouldn't be too shocked by Karihome.
If ever you find fresh Goat's milk in HK, please let me know!
Hope that helps,
Veronika