Here is my YAML file :

ip: "192.168.10.10" 
memory: 2048
cpus: 1

authorize: ~/.ssh/id_rsa.pub

keys:
    - ~/.ssh/id_rsa

folders:
    - map: /home/username/projects/
      to: /home/vagrant/projects/

sites:
    - map: resume.local
      to: /home/vagrant/projects/resume/public
    - map: larabook.local
      to: /home/vagrant/projects/larabook/public
    - map: testlaravel.local
      to: /home/vagrant/projects/testlaravel/public

variables:
    - key: APP_ENV
      value: local

Points to consider

1. Under folders map your actual development folders to one which you want on Homestead ( lets call them virtual for now.) So this (/home/username/projects/) is path to my actual development folder which maps to virtual (/home/vagrant/projects/) when VM is created.

2. Under sites , map your desired domain (resume.local) to the (virtual)folder on the VM. You can bind any no. of sites for now.

The only issue I face is , I cannot generate different tunneling urls for different sites on Homestead. You might want to check out Browser sync and FoodShow too.

I have the same problem under Windows 7