Hardware vs Simh

I've been learning about the PDP-11 lately thanks to the wonder that is Simh, running various software on it and generally having fun. I don't have any purpose other than that at this time. I've been running everything I can get my hands on though I find, given my background, tastes and biases, that it's usually either Unix Version 7 or, especially, 2.11BSD that I'm firing up and exploring rather than, say the more DEC traditional RSTS/E. That said, I've been wondering what would be different (aside from noise & heat ;) about running 2.11BSD on hardware rather than in Simh on my increasingly decrepit Dell C640 running Xubuntu. Logically I should spend the money on a new intel based laptop but what's the fun in that? But then that turns on the question - is there even a cheap PDP-11 that can run 2.11BSD? I don't need a speed demon but how small is too small vs big enough? Let me see if I understand correctly what I would need: A BA23 or BA123 chassis. Would others work as well? A CPU with separate I/D space. 11/23, 11/53, 11/73, 11/83 or 11/93 would work with the Q-bus chassis above. 1mb to 4mb memory, 1mb is absolute minimum for 2.11 BSD & 4mb is highly desirable. Disk controller - though more expensive, sanity really says I should find a SCSI controller like RQZX1, Emulex UC-7 or CMD CQD-220. I have old SCSI disks; ESDI & the like? Not so much ... A RQDX3 & RX50 or TQK70 & TK70 would probably be in the 'nice to have' category as well. DELQA ethernet controller

Would this work? What are the going rates for hobbyists (rather than resellers to those with production equipment)? Are there any, hmm, less expensive bits here or there? This is mostly a thought experiment as I don't really have the disposable cash right now for the various parts right now. OTOH, I find the process of learning more about the hardware, what would be required and how it functions, to give me a better understanding of what I'm doing with the emulator. Thanks to all here (the 11/23 thread has been of great value to me) and to bitsavers ;) and all the other fun resources out there. William