First off, Welcome to the site! I live in Vancouver, Wa, but spent many years in and around Ft. Lewis/ JBLM.
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With regards to cellars, as soon as I came to the realization that I liked smoking a pipe in the autumn of 2012, I sort of went ape-shit. Not exactly the direction most people take. I sampled everything I possibly could. I spent so much time in the Tacoma Tinderbox that I would sell pipes for the girls working there while they were attending to cigar customers.
I tried to get to as many Seattle Pipe club meets as I could so that I could meet fellow smokers and share/trade tobaccos.
I bought everything I could find under the sun when it was on sale. I cellared very wide for fear I would miss out on things as my flavor profile matured. There are many here with larger cellars than I have, but most of them make a lot more money that I do, lol.
This topic came up on another thread and Cosmic said he spent $300/mo for 5 years. I have spent a lot more than that total. One of the benefits of a large cellar, as alluded to by hoosier is that the cellar feeds itself. If you can spend ahead of your consumption, you should be able to sell of a lot of your 5 year aged stuff to buy a ton of newer stuff. There were several years where investment in A&C years Escudo outpaced the stock market, but alas, I missed that.
I don't know where you live in Washington, but you need a friend in Oregon. There is no steady stream of tobacco/ nor can you adequately take advantage of sales with a Washington address. The tobacco laws here are f'ing ludicrous.
If you are ever in Vancouver, hit me up, I will let you sample a ton of tobaccos. My cellar is about 95% input, but the 84 jelly jars I have with 1oz or less have not been input yet.
Tobacco Cellar Wyfbane's summary pipe tobacco aging cellar - http://tobaccocellar.com/Wyfbane