For the mentioned quantity of rice, usually I would have used a kg of meat, but I fell short. I have used boneless beef cubes, but would suggest to use boned meat for more flavor.
While using more meat, add an extra cup of water while cooking the meat for the stock. Add up hot water accordingly.
I usually use an average of 1 1/2 cups to 1 3/4 cup of water for the rice I use. Use water as per the type of rice you use.
The last steaming step is optional. But it keeps flavors locked and will make your rice more apart.