I know it's not the same for everyone, but around here the dollar saved is easier than the dollar extra at sale time.
If I was to take some people's advice I'd lose my shirt 10x over, but there's a balance there too
Just taking feed supplements, Salt, mineral, Lick tubs, grain, cubes just on my small herd would be staggering if I followed all the recommendations. The cows get the appropriate mineral at the appropriate time of year when they need it, high selenium/copper before calving, high phosphorus after calving and through breeding (we're really low in P), but they get cobalt/iodized salt for a good part of the year too.. Lick tubs are for my replacement heifers, or perhaps a cow that's been sick or in poor shape, rest of the herd doesn't get any.. They all get pretty good hay, but no grain
At $140/tub, $40/bag for mineral, $10/bag for salt...
Doing some quick math, at just 2oz/day mineral is a bag every 2 weeks = 1000/yr or about $50/calf, on a 500lb calf that's $.10/lb.. and some mineral is 4oz per day "recommended" intake
Going too far the other way is bad too if your cows are open and you have health problems