It's a fun thin to do and welcome to the community! Don't expect to be making 20 bucks a month though, the new ASIC chips are going to destroy GPU mining. So what gpu do you have?
Thanks! I said 20 every 2 months!

Dont crush my dreams... but seriously, tell me if im not being realistic

I have an ATI 7970.
Any sort of profit done for almost nothing, is always good.. right!?
Welcome to the forum.
the only thing you need to consider is the cost of electricity, from the increased draw on your loaded graphics card. The electricity draw is much less if it is not processing all the time. as long as it is less than $20 every 2 months you're good to go. Or if you do not pay electric for one reason or another.
Thanks for welcoming me!!! Good thing electricity isnt a concern!

Flat fee!