well no one has answered this one so I'll try to give you some advice, $500 dollars thats a good start. if you dont have a school or gym (jkd, wing chun, kali, muay thai,boxing,wrestling,etc)near home to join, then solo training is the other option. some good instructional books, and videos and/or dvds, and equipment...wooden dummy, punching bags, speed ball, large mirror, weights, etc. once you get some of this stuff I'm sure you can find someone to train with you. as far as the iron fist, hand or palm etc. it is rare to find a master of this skill who is willing to pass his knowledge to just anyone, as this skill really needs much dedication and time to learn properly, without self injury to yourself. any way many people have heard the stories of blackbelts whom can break boards, and tiles, etc. but can they really fight? remeber what sijo Bruce Lee said: "boards don't hit back!" ...
if your still interested in iron hand training check thislink...
http://www.wle.com//products/vhg38c.html
goodluck!