Welcome to BOTL.org, David. Here's a Tupperdor that has worked for me for two years without a single issue. It is very simple to construct, very cheap, and very effective for long-term storage:
1)
The container: Must have air-tight seal. Notice the rubber stripping around the edges of the lid. This brand makes plastic containers that are 100% PCB free for non-toxic food storage.
$9.99
2)
The Spanish Cedar: Not required for a tupperdor, but I like the aroma it affords the cigars and it retains humidity, keeping everything nicely balanced in the container. This here is a Spanish Cedar cigar tray that guys usually put in their humidors to separate and organize cigars.
$12.99
3)
BOVEDA Bag: There's many different options to humidify your cigars in this environment, but these little bags are the best. Period. Break open the plastic package and throw one in and that's it. You can replace once a year. One pack for every 30-40 cigars, typically.
$3.99
4)
The Hygrometer: Again, there are many options. Accurites are very good, require no calibration, and display high/low Relative Humidity and Temperature in a 24-hour period. $5.99 at Home Depot
5)
Cigars: The fun part, but watch your wallet! LOL!
6)
The Final Product: Keeps cigars smoking beautifully for as long as you want with practically no maintenance.
$32.96 total cost!!!