Hello, I've just got into bitcoin mining and want to invest more into it. I was going to start on the butterfly labs jalapeno, but people on another forum have told me that it's not going to work out for me, something to do with difficultly. (Don't know much about it) Could somebody help me determine if I will be making profit or not. I've been looking at online bitcoin calculators, mining at 5000Mh/s should get me $13 a day, so in a month, I should have my money back. (Miner = around 250-300) So, what do you guys think? Do I need to look at upgrades or something? (tight budget :/) Also, I've heard of time kind of over clocking for the butterfly labs jalapeno, for like 8Gh/s

Thank you for ready!