I agree with the others, vacuum sealing is definitely a great way to save delicious left overs (and I usually HATE left overs)
Also, I find that it's actually brought my family a little closer because now I have a great reason to call my brother over with his wife and daughter so we can all eat together. Cook up a couple whole chickens, breasts, tri tip, ribs, and plenty of other foods. Makes for great Sunday evenings with everyone and I get to see my niece which is always fun.
If you purchase just a intro type smoker, then it isn't insanely expensive for your smokes, whether every rack is filled or you just have 3 or 4 chicken breasts.
I myself have the Lowes Exclusive, Master Forge Dual Door Smoker. It's not huge, but its great for my needs / skill. Doesn't seem to waste propane at all either, a tank seems to last about 4 - 6 smokes, and when you consider each smoke lasts at least around 2 hours every time, it's not too bad. 20 dollars for a tank exchange is a small price after all those delicious meals :D