Its so hard to know where a person is for skill level, and what they are really asking.
If ya explain simple, you are talking down to them.
If you explain some details, ya are talking over their heads.
Always tough to know.
I too was/ am a bit concerned about the cart before the horse, and what you are getting yourself into with the cattle. Most here are in a version of survival, everything needs to pay its way. With 4H cattle, that's a different deal, buy feed, push feed, and it'll be fine, doesn't matter what the costs are. Different answers then.
The trees - you got a lot of them there, don't know what kind, if Christmas or different tree plantings type. Selling a ton of saplings is a job of itself, not sure you realize the time and salesmanship that will take. But maybe you have a nursery all lined up and done deal, like always on a forum just good natured speculation.
Anyhow, here is a well written handbook on pastures, good starting point. No point repeating it when you can easily print out this web site:
http://www.sheepscreek.com/rural/pasture.html
Paul