Just an observation but for me, in the transition from small format to larger format, the biggest issue was the upgrade of the darkroom. My biggest cost factors were in the 4x5 enlarger, the enlarging lens, figuring out how to develop the negatives etc. The bulk of the investment in the camera side comes in the lenses, and one nice thing about large format is that the lenses can be used across different camera platforms - invest in a good lens, and put it on a graphlex first - if you find that you want more movements, get a monorail and use the same lens, or if you are hiking and want less weight, a Tachihara folder may be the answer - again, you use the same lens.