1. Is all air conduct (pipe etc) working? The A/C machine itself is only about $2000. But the pipe system cost more. Ask JY also.
2. What's that? Some clug or?
3. How much the treatment cost will be?
4. Make sure HOA will fix, not you. Sometime fix mold problem cost a lot.
5. Ask VA;
6. $1,400~$2,000 is nothing. I bet PM quote you together will be better. If you look all contrcators on your onw, total cost will be more;