that will work,
but eventually you will have freezers, manifolds, multiple regulators, SS faucets, glycol boxes made from torn apart window air conditioners, towers, portable paintball systems, jockey boxes made out of coolers, a beer engine. Basically more gear than an average tavern.
call some local welding gas suppliers before buying a kit with a tank. i just picked up a spare 15lb tank full for $80 and account refills (actually swaps)are $15
kegconnection.com has some good deals on kits