Central Air Installation
I have a 1600 sq ft one-story 3bed/2bath home. My home has an accessible attic (though you have to walk on the joists) and a crawl space underneath. I would like to add central air from scratch to the home. The estimates I have received don't seem to take into account that it will not be necessary to go through the walls. What is a reasonable number that I should expect? How hard would it be to do myself?