Hardly. As Rocketjunkie points out above, 12 amps @ 120V is 1.44kW, not much under 2kW. An electric toaster or iron is typically 1.2-1.5kW.

Using the Texas average electricity rate of 10.39 cents/kW-hr, your $30/mo works out to 289 kW-hr/mo, or 9.6 kW-hr/day. So if your load is on for 10 hours per day, that works out to an average load of just under 1 kW, or 8 amps @ 120V. So that seems about right, but if you need 1 kW for just those few things, how do you figure 2 kW would power your whole house? Or cost many more times than what you are doing?