Hey!
I know what you mean. Sheet films are very expensive now. I think Kodak no longer have 4x5 film in 25 sheets pack. A box of 100 sheets T-Max 100 now cost $70. My Sinar F1 have been collecting dust since late 2005

And it is not hard to set up your LF cam around NYC without getting attention of police, building securities and etc.
Anyway, I used to own a Mamiya RZ Pro II cam with 110mm f2.8 in the late '90s. Beautiful camera, the lens produce great image also and the 6x7cm is the same proportion as 8x10"

Take care,
Buddy