depends..
It depends a lot on your particular situation. I have my own cooperage but can't keep up and am looking to augment with keg credit until I am big enough to go to MicroStar. I've run the numbers six ways from Sunday regarding lease vs. buy etc. It comes down to one basic issue for me...
"Pay me now or pay me later"...
Depending on your financing there are two ways to think about it. If you have a good amount of available capital (which no one ever does) then you may be better off buying them. Then it is a capital expense on the balance sheet you can depreciate etc.
If you don't have the capital to buy kegs then leasing may seem like a better plan but you have to make sure you have enough monthly income to pay the "extra" bill every month for the lease. Now it's a part of your COGS too.
In my case I had capital funds to buy my first "load" of kegs. This was good because in the first few months my income was almost nothing and if I had to pay the monthly lease I'd be dead. I just bought my second "load" of kegs but had to scrape money out of the couch cushions to pull it off. Since I have a (slightly) more steady income I am considering leasing my next "load" so that the capital can go towards other equipment....
It sounds like in your case you only need a few kegs. If I were you (which I am not) for that small an amount I would try to find some used ones to buy. The capital outlay isn't as huge but it's a one time thing and not something you have to keep paying for every month just to end up with nothing in the end.
Just remember that even with the lease you are paying a deposit up front and at the end of the term you are charged FULL REPLACEMENT cost for any kegs that got "lost" during the lease. I worry about what the bill will be at the end of the lease and whether or not I can afford it at that time. Probably my biggest issue with keg credit is that if I lease kegs for 5 years and then come up a few short when its time to return them I have to pay new cost, not a depreciated cost at that time.
Don't know if this helps or not...
Scott LaFollette
Blank Slate Brewing Company
Cincinnati, Ohio