It is not possible to do A & A as you have exceeded more than 50% to the GFA. It will be considered recon (edited from "rebuilt" to "recon").
Also, the structure likely not able to support to build upwards, and will definitely need to build extra beams subject to soil condition.
What I understand is just for A&A IT, land about 1600sqft, it will cost around $300-$400k. To add an additional level, increase front & back, a contractor previously quoted me $800K bare unit (Increasing GFA by additional 90%)
I did a rebuilt on my purchased OLD property, land ~2000sf from 2 to 2.5, extending front & back, increasing GFA by about 90%, simple materials, about $1m (excludes carpentry/ toiletries/ Lightings). Is it consider reasonable? Wish I have found this forum earlier and could have find out more.