Medium-format digital photography is expensive. There’s no two ways around it. Digital large format isn’t even really a thing outside of scanning backs, either. But we are able to emulate the look with smaller sensor cameras.
For large format, we’ve got the “Brenizer Method“. For medium format, we’ve got the Fotodiox RhinoCam Vertex (buy here). This adapter lets you mount your old medium format lenses onto mirrorless bodies to shoot larger than full-frame images.