Budget friendly bar options?

We have a bartender who is charging a decent rate and are curious what everyone else did for the bar.

option one we do a toonie bar where we supply all of the booze,mix,cups and straws etc but get to keep any money that is made from the drinks.

option two we have the bartender supply everything and do a cash bar (no control over prices) the contract states a minimum of $300 profit is to be made or we must pay the difference at the end of the night.She estimated that we would need to sell 150 drinks to reach her minimum.

For those that did the toonie bar was it successful?We will be having anywhere from 75-150 guests and the list keeps growing 😳 I know that not everyone requesting an invite will show and those that do might not all be drinkers so it’s hard to figure out if the 150 drinks will be met.How did you figure out how much booze to buy?What kind did you buy?Any idea what a realistic budget would be for 100 drinkers?Some of the people are light weights and others are heavy drinkers.

For those that went the cash bar route did you meet the minimum?What was the average drink cost?I don’t want guests spending a fortune but I don’t want to get stuck with stuff I won’t drink.

Is it tacky to do a Facebook poll to find out who the drinkers are?