Depends on your management preference and practice. You hold back heifers, you'll need to get a different bull. You want your cows calving around a certain time, you'll need to take him out.
Cows can be just as mean as bulls. Bulls can be just as gentle as puppies. Don't believe everything you read on the internet.
Cattle in general are hard on fences. With a bull it depends on the bull, how many ladies he has to service, whether neighbors have ladies or other bulls, etc.
Sounds like maybe you should stick to poultry. Keep researching and maybe one day start with a few cows.