My bill in Florida shows kWh for the month and a daily average and last year's use at the same time. I used 109 kWh this past month and paid $18.95. That's 17 cents a kWh.
You paid about 20 cents a kWh, so you are probably reading the bill correctly.
The Breezy 5.5 is easy and inexpensive to install, since it needs no batteries and has it's own inverter circuit built-in. BUT, if you don't get steady wind fast enough to keep it on-grid, then you may not see much of a reduction in your electric bill.
Before you settle on a particular turbine, you should contact your state house rep and ask them what is allowed in your area. There may be rebates (or not depending on who is paying - California is broke). Don't forget to demand a total cost work-up (tower, permits, electrical hookup and inspections).