Sixpence, if you're just starting out get a Brinkmann Water Smoker, known as the ECB for El Cheapo Brinkmann.
Currently on sale at the local ACE Hardware stores for ~$28.
Then go here:
http://www.bbq-porch.org/faq/07-2-1.asp and make the necessary improvements. Some of the newer Brinkmanns already have some of them improvments. Brinkmann is listening apparently.
Notes: For those of you who can't get Dr. Pepper or perfer something a little more "natural" use Curv's marinade and substitute Apple Juice or Apple Cider for the Dr. Pepper. I leave out the bourbon too. I REALLY like that one.
As for rubs and sauces, they're available online. Or let me know and I'll build you a package and ship it. PayPal for ease of transactions and you can have it for actual cost. I can pick this stuff up at the local grocery 1/2 mile from the house.
I live in the little city that holds the Kansas State BBQ contest every summer.
Life is good.