Just so others know, cast iron does not have to be expensive. I have 8 cast iron pans and my favorite and best ones have all been found and acquired for no cost. I have a few specific ones i purchased (griddle, enamel coated pot).
Found pans usually look horrible and unusable but with a little work they will be the best pans you own and last forever. Look at yard sales, estate sales, community cleanups, scrap bins, grandpatents basements or attics.