i think that you can do cheaper than that, if you go with dominican made inversor, and cheaper batteries. but i'm not down there now to shop. check the local papers..........most places in the DR have inversors, and they can't afford to pay for an ice cream cone, they are out there if you have time to shop..........also you want to look into solar panels to charge those batteries, charging batteries ain't cheap when you use the local elctric co.,,,it can be the most expensive electric vampire in the house. also, make sure your inversor has an OFF switch, you may go away for a weekend or week and those batteries are still being charged and just because you turned off all the lights don't mean the inversor isn't sucking juice...............