I grew up on a ranch which ran goats, cattle and sheep all together in various mixes. Trace minerals are not a problem. Poisonous weeds can be. Be SURE and get sheep/goats which were born/raised locally...they will know which ones to avoid. There are numerous stories of people who import animals from elsewhere who are unaware which local weeds are poisonous and death rates can be high.
Billy goats STINK when mature...not very romantic at all. They can also become aggressive to people if you make pets out of them...don't do it...make them keep their distance from you...a foot or so...else they will butt you/anyone to find out who is tougher...and will not learn once they lose their fear of you. That said, I recommend goats ahead of sheep. They more frequently have twins or triplets. And the market for cabrito is good.
I recommend you stay with goats and/or sheep. You can manhandle them. Not so with cows...and cattle need far more infrastructure to be safe...stronger pens, higher fences, bigger trailers, a squeeze chute to doctor/manage them. Keeping a bull so you can have calves is lots of food for few calves. Getting run over by a momma cow is one time too many. Making sure you have gentle cows is harde nless you are experienced with cattle. And, even then, loading cattle into a trailer requires skill. Cattle can actually hurt you bad. Your ag exemption only requires income from farm products...cows not required.
It is VERY EASY to get too many animal units in one pasture...leading to severely degraded grass which takes years to recover. Do not overstock. One animal unit is a cow+calf or a bull or 4 sheep/goats.
You can get the county ag people to tell you how many animal units you can run, year round. You must figure this number out and stay well under the number. You are going for a picturesque setting....so beware that too many animals will give you bare ground and goats will stand on their back legs and eat as high as they can reach on brush and trees...which can be good if you want things to look like a park...or not if you wish undercover for rabbits, etc.
Basically, a fence that will hold sheep/goats will hold cattle...and using a single wire of electric fence on the inside will protect the fence. Cattle, once trained to an electric fence will stay within a single wire of electric fence...until a baby calf comes along, then it will bumble through ...
All your animals should be managed using "call up" feed to bring them into the pens/sheds....much cheaper than trying to cowboy with horses.
In our area, yours too I would wager, the only way to avoid the heartbreak of coyote/dog predation...and hog...is to put them in a tight shed at night...not just a pen.
If you go with any electric fence, get back with me...I have experience and can recommend the type of charger, insulators, and fence tester to get. In particular, I have found a fence tester which leads you directly to the problem area of a fence very fast...sooooooo much better than the 5 light fence testers.
Remember, the more pastures you have, the more water solutions you will need to install...and keep operating....and while it would seem a simple thing to keep a trough operational, they seem to malfunction multiple times a year.
Also, consider that with animals, you need to daily make sure they are OK...thus need a trusted person to watch over them when on safari!
Enjoy the adventure...much to learn..suggest you first visit somebody who has been keeping each of the target species for several years, observe their facilities and animal behavior and discuss how they handle them to doctor and sell.
Here is info on each type of fence by animal type.
Langston University Goat Research Extension
