Ah, so you're right at the start, no worries. Save up enough for the bar, maybe an upgrade or two if you've got the dough. Use the subsequent new revenue to upgrade the bar further, throw in any of the three tiers of advertisement - I usually go middle tier. That'll be all you need, but if you want you can splurge for the sports day stuff added in the v0.11, that'll get you rich pretty quick.