The steel bars are 25mm, and I don’t know the length of the wall. I suggest adding two more cantilever beams, using hollow brick walls on the second floor, adding more windows to reduce weight, and just enlarging the foundation appropriately.

For ground beams and ring beams, if you use 12-meter steel bars, you will need 39 steel bars. The ground beams will use national standard 18 steel bars, and the ring beams will use 14 steel bars. For empty beams, you will need 11 12-meter-long steel bars, and use 14 or 16 steel bars. Thick ones, 10 lifting bars, 10 meters long non-standard 8 to 10 thick ones will do, 100 main bars for cover, 100 negative bars for standard 12 or 14 thick ones, 30 set bars for 10 meters long.