If this is to be YOUR business plan- surely you need to be coming up with it? I'm sorry if that comes over as abrupt or rude, but we cannot make plans for you at the end of the day it has to be what you can do, and what you can cope with. If we say it will take 30 milkers to run this business- can you manage to look after that many- do you have enough room, enough grazing, enough time to sit and milk them all (in a specialised milking parlour) and then to filter, cool, maybe pasturise the milk, and make it into all those products you mention?
You need to speak to people at every part of the industry- how much will it cost to set up your milking parlour, to develop the products you want to make, never mind the stuff at the start, like sourcing your animals and food for them.
I can tell you exactly what MY business plan would be- and I would love to do it. Unfortunately I need my monthly wage, and with working full time, I do not have the time to start the business plan- a vicious circle. I would also need more land than I have just now.
You ask about prices-where are you located because prices will vary in different parts of the country. Also, what the price is today for animal food, might not the same price that it is in 6months time. If you really what specific help aimed at you- you need to tell us more. Do you already have land, if so, how much? Is it suitable land for goats? Is there extra space so you can grow your own hay/silage which will cut your feed costs down. Are there buildings already there you can utilise to turn into that milking parlour, or a cheese making room etc. There are rules and regulations about producing the milk, the processing of cheese, cream, the packaging of it etc etc.
There is a huge, huge amount to consider.
Beth