Some of you have suggested that a 4x5 is the better tool. Well, it depends on the job. Just for the record, I shoot mainly 4x5, 5x7, and 8x10, and my Mamiya is no substitute for these. They are quite different things.
I also have a Crown Graphic and Super Graphic and have shot with both, hand-held and as a substitute for a full view camera. It is of course quite possible to use either of these hand-held, but you shouldn't minimize the difficulties. The OP was getting the impression, I think, that you just pick it up and shoot. As you guys know, this isn't true. If it isn't cammed, you have to find the proper cam and you have to set it up. Getting good with a press camera is not trivial, and, to me at least, it didn't sound as if the OP was aware of the level of dedication involved.
My reading of what the OP had to say led me to suggest that he would be happier with a medium format camera. He is also on a budget and a box of sheet film, especially when you are learning how to use the camera, is a lot more pricey than rolls of 120.
Having said that, he may just love shooting a Speed Graphic and can afford three boxes of 4x5 an hour. I shoot large format all the time I and sure couldn't afford it.