Hi there, im website developer from indonesia, expertise in ruby on rails, php and responsive website.
here is answer of your following question :
1.) approx building in 4 days from all detail job provided and fixed and 3 days more for testing and review and correction , i prefer using ruby on rails it will be faster for me to build and develop, also the app will be more powerful and lightweight.
2.) i have front end designer team , and i'm the back-end programmer will work at same time , for front end i will use bootstrap framework so the website will be responsive , and back end using ruby on rails framework
3.) none i guess
4.) all project detail and resoruce , e.g doc , pictures and website workflow
5.) 30% milestone , and all payment after the project live , tested and done
6.) ruby host will work awesome
Look forward to hear it from you