What are you looking for? Are you looking for longevity or a good milker? What kind of facility do you have. Is there someone around there that will pay a premium for higher quality milk? What do you have for land? What are your feed costs? Sorry for all the questions but it helps to make the best choice.
No its not a problem. Actually the questions u've asked were need full things. I'm looking for good milker. I've got 3160 square feet of agri land and established shed for cattle which will be enough for 4 adults. I think no more people there to pay premium amount for quality milk.
Brown Swiss is going to be your best milker between the two and they have a really mellow teprement. They will give about 65lbs a day. They are the size of a holstein and the colors of a jersey. There milk is really good for cheese and cream to. Basically they are just big overgrown pets.
Jersey will give 48-50lbs a day but they get upset really easy which will affect their milk production. Are you selling the milk to local individuals? You can get $6 - $13 a gallon doing that. Hope this helps.