"Sulfur (or cattle-bag mix) ought to be enough cheaper than the other stuff..."

Well, probably not, since you will need about 10 lb of elemental sulfur per thousand square feet of land.

You will also have to hire a tractor operator who has both spreader and rototilling attachments. Spreading it on the top will do little good if it all blows away.

Elemental sulfur can be found a farm supply stores in 50 lb bags for $25 to $85 per bag so shop carefully. Your one acre is about 43,000 sq ft so you will need 430 lb of elemental sulfur. That's about 9 of the 50 lb bags.

I suspect land must be completely cleared for the rototilling to be done.

Have fun.