I just couldn't cope without my offsite storage. I have a wine fridge at home that holds around 160 bottles - roughly 15 months' drinking. I have offsite storage with three different wine merchants that I use for full cases (or six packs), offsite storage at Octavian for medium-term storage of mixed cases, plus a small locker in a purpose built, refrigerated and humidity controlled wine store in Chelsea that I can access pretty much any time I want.
Cost wise, I actually looked at all these recently as I was trying to figure out what my options would be when the children leave the nest. Current storage costs run at:
Chelsea walk-in storage - GBP 1.46 per bottle, per year (say $26.30 per case at today's exchange rates)
Octavian medium term storage - GBP 1.00 per bottle, per year ($18 per case, per year)
Merchant storage - GBP 0.75 per bottle, per year ($13.50 per case, per year)
Having no cellar under the house at home, and very strong advice from a structural engineer that it would be extremely unwise to put one in, I have been looking at the economics of converting one of the childrens' bedrooms into a walk in wine store once they have moved out of the family home. I could do this either by using lots of insulation and a cooler unit, but I'm also very tempted to invest in one of the modular walk-in wine cabinets such as
these, but they are rather expensive - that's a lot of wine I could buy for the same money!