If you use a hand pump you are introducing oxygen which will spoil the beer. Needs to be on CO2 to keep.
For $100 plus the $50 for the pump you can have maybe 21 pints for about 12 hours before the beer goes sour. For the same money or less you can buy a quarter, rent a Jockey Box with CO2 and have about 62 pints of beer. Served proper and not sour as long as you have some ice. You could possibly get a half barrel, 120+ pints for the same money. That's real beer! Deal? The return is atrocious on the $140 10 pint system. Wow. What balls. Not an option. Why would you? Even if you already own a pump. This is bad beer served the expensive way. No. Not a good value and not a good way to serve beer either. Cooperage (aka the keg) is expensive stainless steel. Don't buy cooperage. Borrow it. Cheers. Edit - Let's not even discuss the particulars of transferring beer into your very own mini keg, purging oxygen from your mini keg and keeping your mini keg sanitized. You want to bother with that nonsense? Edit edit- "The problem was that all we could get was a 64 oz growler but it was only good for a few hours - it was flat the next day. " OK. These guys are officially fucking obnoxious. If flat beer is your problem, oxidized beer is not your answer. This makes me angry and sad. These assholes would have you believe that beer served with a party pump is acceptable for more than a day. Less even. It's not. And they know it. It's worse than flat beer. Fuck these jerks. Because they wrote this I hope people search for reviews and land at this diatribe. DON'T USE A PARTY PUMP to serve beer and expect the beer to last for more than a day.
I kind of feel bad for all the poor schlubs that get this as a gift from otherwise well-meaning friends and relatives. So much work for little payoff, and think of all the states where breweries cannot fill outside growlers. This must be aimed for the homebrew crowd right? Even then you can solve this problem of cheap growlers by using actual growlers that most people have, or my solution is a 2 liter soda bottle and a carb cap.
I'm really not sure where to start without knowing what you have already. Plan for: ~$50-100 per 5 gallon keg depending on used/new and ball/pin lock ~$20 per keg for quick disconnects, o-rings, etc You'll want cleaner, sanitizer, tubing, co2 tank, fixtures, distribution manifold depending on how many kegs you get, regulator, faucets (or some way to serve). You need some way to keep kegs cold as well. I made a keezer for about $200. How many kegs are you looking to get?
I have NO keg equipment but was thinking about a keezer. Hopefully at least to beers on tap at all times.
It will take some time for you to research all your options and come up with a setup that works for you. Come back to this thread with a shopping list and we can add/subtract/comment based on that. I got my kegs new from Adventures in Homebrewing: http://www.homebrewing.org/AIH-New-5-Gallon-Corny-Keg-Ball-Lock_p_5100.html. Hard to beat their price for new. You can find cheaper for used or pin lock without too much trouble. I wanted new. Kegs will be probably 50-70% of your total cost for the system assuming you get around 4 kegs, which I think is a sensible amount for having options in what you drink and have conditioning. I got most of my fixtures from Adventures in Homebrewing as well. Don't cheap out on the regulator or faucets.
