Hi, we built a new great room addition onto our exisiting home a few years ago. Our AC/Electrician installed a 2 ton size for this room...which from what we understand cools/heats up to 1,000 sq. ft. The cost was $3300.00. We have 2 walls of french doors (4 door panel) & a 14 ft. vaulted ceiling. This a/c & heating unit works great! In fact, we're getting reading to install a replacement a/c & heating unit in our upstairs of our home (our house is 20 yrs. old & we're renovating it). A 2 1/2 ton is similar in price...a few hundred $'s more. We live in Louisiana & with the summer heat here....well, we need a good a/c! Looks like your price quote was similar. Good luck!