How much money will a Merit Megatouch Rx a Month?

I'm about to buy a Merit Megatouch Rx. I've saved up almost $3500 to buy it, and I'm interested in putting it in a pub/bar or restaurant. I'm wondering if it is worth it. How much money do you think I will make a month from this machine? I will set it up to accept credit card, cash, and coins. I know that half of the battle will be finding a place to put the machine. Do you think I should find a place to put the machine before or after I buy it? Also, What percentage should I split the income with the owner of the pub? 50%-50%? Thanks! Btw I am 15 years old, and I've been trying for the last 4 years to make money. I have an app in the iphone app store, and etc. I really need good answers to this question, because I can't waste the money I've saved up. The reason why I think this is a good idea is because I think it will be steady money, and I could potentially expand with more machines in more pubs and restaurants. What do you think?