Much like how I've gotten onto a PDP-11 kick - yeah, it would be neat to have my own 11/70, but the power and space requirements would be insane, I'd have to track down rare and expensive pieces, and I don't have quite the skill set to debug/repair old hardware to the component level. SIMH it is (and it has a zillion other emulators as well).
Modern hardware can emulate an 11 much faster than any real one ever built. RSTS/E installs in seconds when your "disk" is NVMe and you don't have to wait for a DECwriter II console at 30 cps.
You may wish to consider the PiDP-11, a frame that replicates the PDP-11's blinkenlight panel, into which a Raspberry Pi running SIMH or similar can be installed. Attach a terminal with a USB-to-serial adapter, and the experience is complete, without the drain on power, space, time/effort, or money. It's like THEC64 for the DEC mini world.
Modern hardware can emulate an 11 much faster than any real one ever built. RSTS/E installs in seconds when your "disk" is NVMe and you don't have to wait for a DECwriter II console at 30 cps.