When I was "Working" aka "Hassling" with the DISH tech support, I started with the 211z, then 4 Walleys (not RV friendly) and they accidently sent 'on purpose?' the 211k.
I immediately sent it back cause it just looked like a 5-yr old model.
The 211z is working fine, no problems. No idea on Amps etc.. sorry..
My recommendation would be the 211z but you'll have to judge the power/electrical stuff.
211z on Amazon apx $85 and might have the electrical stuff you'll looking for
https://smile.amazon.com/s/ref=nb_sb_noss/145-1198063-6032615?url=search-alias%3Daps&field-keywords=DISH+211z
Hope that helps..