Not an answer to your question but it sounds similar to me a few years ago. I was determined to go medium format. Then with 4x5 prices falling on ebay I decided I might as well go 4x5, then I ended up saying well if I'm going to go 4x5 I might as well go 8x10 and contact print. If you are on a tight budget think about 8x10 and contact printing. A used 8x10 off of ebay, some holders, a used spot meter, contact printing frame, lightbulb, and paper, you're practically set -and it could be a lot cheaper than getting a medium format kit, enlarger, etc..