When I take the numbers you've listed above, and add in your annual expenses (spread out over 12 months), I'm getting a total monthly expense of $4696. So most months, it's going to be close. I realize that in your budget, you're considering checks 25 & 26 as extra paychecks in 2 of the months. And you also have your annual bonus that's not in here. But I'm also not sure that you've included all expenses. Cell phone? No number for home maintenance/repair? Clothes? Your budget also doesn't have any line item for savings/vacations/etc. So if we're working off of a regular net income of $5k, you'll probably be right up to the edge of it most months.

It feels like it's going to be really tight most every month, and you'll be reliant on those 2 checks and the bonus to buy back breathing room. So you'll likely run at a slight loss many months, and you'll need those checks to balance it all back out. And what happens when you need to replace a car?