2nd hand Mahlkonig K30 Vario might be a reasonable choice. Be aware that most hopper feed grinders will have at least some retention

Is the OP interested in direct plumbing & draining of their machine? How about installing dedicated 120vac & 240vac circuits to service this setup? What about a grinder? Probably a LM Micra might be the next logical step at this point in their travels, providing funds are available

Monitor & photograph your results for reference as colour is an indicator of scale present and your progress

I'll wait to hear results of double blind taste testing

Right now i'm using a Mahlgut Palm Tamper & Dozer that I like very much. Next tamper will for sure be either a Puqpress or a Compak Cube. Both are electric. That's the BUZZ

Gorgeous looking machine & set-up. Congrats & Enjoy!

I would check or replace the steam boiler temperature probe and listen to JRising

Well then, no need to talk about, 'out gassing'

Can the cam lever assembly be assembled in the wrong position?

Can wait to share your process and excitement and to hopefully view a video of it in action pulling a shot! Congrats!