You have gotten lots of good advice here. My post is mainly just to re-interate what several have already said, in a little different way. Afhm said to go "intern" with your great Uncle for a year or so. Absolutely. Let him help you learn how to work a HERD of cattle. Working a HERD is lots different than raising a couple of show steers or heifers. As is maintaining a barn and small lot for a couple of animals versus a farm with the fences and water systems and hay raising to maintain and/or improve. Learn how your Uncle has done it first then, figure out where you want to go with it and how you are going to get to that point.
Chambero is right in telling you that you should expect to sell a calf for about $600.00 and that is before any expenses. Remember that you will have utility bills, (electricity, phone, gas/propane) for a house? and well(s). You will need a vehicle and the associated expenses with that. You will have fencing and equipment expenses. You will have expenses associated with putting your hay up. Vet, vaccine, and supplemental feed and mineral expenses for the cows and calves. And also taxes, property and income.
I don't know West Virginia but, I do know that there are a lot of places in the USA that will support 100 cows on the acres that you will have (mine is not one of them :'(). 100 cows is not too many for one person to take care of. JMO. Along with your "internship" I really would encourage you to get a degree, two or four, or train in a vocation that you enjoy. Something to provide additional income. You are going to find that $60,000.00 less all the expenses is just not much. Now, while you are young and don't have the responsibility of providing for a family is the time to spend the time necessary to do this. If you can find another thing to do that you enjoy then if you want to expand your operation you will find it much, much easier to do.
The above is JMO, and I hope this works out as great as it sounds. What a great opportunity your Uncle is presenting you with and how blessed you are! This could be an awesome stepping stone for you. Good luck and work hard! Hard work is 10 times better than luck. I am proof of that, I'm not very lucky, but I don't mind hard work, so I've been able to get where I wanted to go. You've got the luck apparently, work hard with along with it and you'll do great. (clapping)