An Android application similar to Couchsurfing

I'm interested in building an app along the lines of Couchsurfing, but only for Indian MBA students going on an exchange programme. Here is the idea : Every year around 1000 MBA students from India go on student exchange - mainly to Europe and mainly to travel around.(approximately 70% of the 3 months in Europe is spent on travelling) Couchsurfing as you might know, is a website which allows people all over the world to share a "couch" with a traveller - a place where a traveller can crash the night without having to rent a hotel or a [login to view URL] host gets to meet people from all over the world and the guest gets free accomodation. Now,the problem with Couchsurfing is that one has to apply/ask permission from the host on the Couchsurfing [login to view URL] are high chances that the host rejects the application,hence the need to send out multiple requests - sometimes 15-20 just for a single night's stay- which is quite cumbersome.I tried couchsurfing when i was on exchange in europe..and it didn't work. Instead, if the network of hosts comprises of only couches of indian exchange students, getting accomodation should be simpler since there is a higher degree of trust between indian students, and there is a 90% chance that if the host has space free in her house, she will allow a fellow exchange student to bunk for a night or two (provided she is not travelling herself). This way, Indian travellers get to save a substantial amount on hostels. I hope i've made the idea clear. I need someone who can design an app - which can handle around 1000 users,help schedule visits,help its users to navigate to an address,and maybe have something of a rating mechanism too. Please let me know if you would be interested in taking up this project. Looking forward to hear from you!