There are many breeders of minis in this area that have horses under 30". They look tons better then that, and it may be the hooves, but their conformation tends to be far superior. If you ask me, a good breeder will take care of a horse, despite of when it is weaned.
ETA: The breeders around me do not typically breed for under 30". I was mistakend when I was always seeing ads for under 30 minis. The ones they do breed are very well conformed though, generally from what I see through the Miniature Horse Club of Ontario.