Looking for air conditional

I need to find suitable air conditional for my home. I know that is is not easy task I ask some quotation of the air conditional.

Just last week I ask the technician to come over to fix the water heater, it is spoiled and I was told not to use it any more. I also know that I pay USD$250 for new water heater, it is costly because some things increase price so they also increase. :(