Steel bends, aluminum breaks. The force it takes to break a good alloy wheel would bend the crap out of a steel one.
I did my time/years dealing with steel wheel balance and wobble issues.
Alloy has been worth every penny of the small cost increase.
If your plans include off roading at lower tire pressures, alloy may actually save money if you have to pay for rebalancing, which will happen quite often with steel wheels.