Remember cigars for humi's are measured in coronas. So 10 to 20 coronas may hold 8 robustos, and only do the longer ones, churchills, lanceros, etc., sideways, further reducing your storage. Also, the smaller ones don't seem to regulate RH as well.

Get one that can do at least 100 but 150 is better. Also, having it almost full helps alot with the RH so search for good bundles and you can fill it up for cheap.

While it may seem like your biting off more than you can chew initially, you will be happy you did or you'll be doing it in about 2 months.