A walk in sounds great, but I think that would be a bit much for all but the smallest group of cigar smokers.
I have a nice closet in my man cave. I'm not sure if I want to convert it to a large display cabinet or just tuck some coolers and or upright freezer in there for large quantities and long term storage.
Good thing I have a long time to plan it as that will likely be the house I'm in fir the next 20 years if not longer.