It is possible but not easy.
It depends on exactly what you've got in mind, how old the calves are if you are doing grass only, where you are planning to market them, heifers or steers, etc etc.
We have reared calves for a good number of years. Some years it makes money, some it doesn't. In the good years you have to pay a lot to but stock in in the first place so have to keep your fingers crossed they stay good until you sell them in the autumn.
Possible and feasible, but as uncertain as anything else to do with livestock.