A half gallon starter (1.8L) will be more than sufficient, unless you're doing super high gravity. I will sometimes take a vial of yeast, build a 500mL starter using 10:1 ratio of water:dme. 500ml water, 50g of DME. This comes out to something like 1.050 or so. 24hours on the stirplate...
Stable humidity kind of requires an enclosed environment. Also "air exchange", which sounds rather myth-like to me, is easily achieved by opening the humidor to grab a smoke.
The Original
Partagas was the first to release a culebra as a production cigar. Stories suggest that tourists visiting the factories would see the culebras belonging to the torcedores and presumably be wrought with envy over the unique braids (The origin of the culebra remains debated)...
http://beeradvocate.com/beer/profile/1146/10672
They have them for 9.99 here, last I saw. I stashed one away in my 'cellar' but I think there's more on the shelf.
lmk
edit: I haven't seen the vanilla.
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