Welcome to the obsession! If you haven't already purchased your equipment, we should be able to give you a lot of advice and save you $$'s up front. Tell us more about what you plan to purchase. Are you going to start with extract kit's, or will you jump right into all grain brewing? The more we know, the better we'll be able to get you jump started in the right direction.
It can be an expensive hobby, but if you plan ahead, you can avoid purchases that will end up sitting around as you grow.
For example, one of the most common purchases is a boil pot that is too small. Most people think, I'm going to be making 5 gallon batches, so an 8 gallon boil pot is plenty large enough. However, a full boil of the entire batch requires that you have anywhere from 6.5 to 7.5 gallons of wort in the pot, so that you have 5.5 gallons when you're done boiling (you'll lose the rest to evaporation during the boil. So, if you're starting with 7.5 gallons of wort, there isn't room for a vigorous boil. It will boil over and make a sticky mess. Boil overs are something that can happen in a heart beat.
Your now very understanding wife, won't be so understanding when you boil over sticky sugar wort all over her stove top and down the sides, requiring that the stove be pulled out to clean. I brew in my garage on a large propane burner (like a turkey fryer burner, but more powerful) in a 15 gallon pot. This allows me to handle 5 and 10 gallon batches easily.
The advice given here about boil pots is to purchase the largest pot that you can afford right away. You'll never regret it!
There is a lot more advice, but that one is easy when someone hasn't purchased anything yet.
So, please, fill us in and we'll all chime in with great advice. You'll be able to wade through all of it and plan your purchases ahead of time.
Once again, welcome to the group!