Research B efore you rush out to spend your money, you really need to think about where all this 'treasure' is, that you hope to find.
Nothing is more disappointing than getting 'skunked' on a fishing trip.
Quite often, I explain the treasure hunting hobby as 'land fishing'. Just as you wouldn't expect to find many large mouth bass in your swimming pool, you probably shouldn't expect to find Civil War relics in that new housing addition in Minnesota. If I'm in a state that never saw a Civil War skirmish, my only hope of finding a relic is the possibility of recovering some veteran's or his heir's items that may have been brought back, and discarded or lost. I would expect very low odds of success. If I were 'lucky' enough to make this find, I know it would have been an unusual occurence.