I possibly could have gotten by on the 110V charger commuting no more than about 40 miles. The display showed that charging would have to begin soon after I got home, and often to fully charge indicated it would have to remain plugged in until noon or 1 pm. I didn't need a full charge to commute so could leave with the range less than full.
If I had to make trips that added up to much more than 40 miles I would have been in trouble.
I had decided to get the Level 2 charger anyway as the ability to charge completely in less than 4 hours perfectly fit the Virginia Dominion Power plan for Electric Vehicles for off off peak charging. Beginning at 0100, 1 a.m., the rate for electricity on my EV plan is 5.5 cents per KWh, so it costs me 75 cents perhaps to drive for one day compared to almost 2 gallons of gas, or $6-7 a day.
On 110V I would have to begin charging before 10 pm which is in one of the peak and most expensive periods to use electricity.
I don't know if that would ever pay off, as electricity is cheap relatively, but I wouldn't want to pay 17 cents per KWH as when charging the Focus consumes about 1500 Watts, similar to 3 large plasma TVs.
I did buy the Leviton charger but the Best Buy visit was largely a waste of $99. You may be able to contact a trusted electrician who could buy the Leviton charger. My electrician from Virginia Beach area was great and discounted a couple of hundred dollars. He said he could get no discount buying the Leviton charger off it's list, so he couldn't discount that for me. I think his total including the charger was $1299 compared to the suggested price of $1500. The Leviton may have been around $800, but it works well and talks to the Focus very well.
Edit. Good Luck! I really enjoy this car a lot.