Building an e-commerce portal as the one for small Chinese companies alibaba.com .The goal is to give opportunities to small and medium-sized  all over europe l to have a showcase in the european market but also in the world for their internationalization . The model to follow is the B2B alibaba.com one,with also the implementation of an escrow system against fraud . Obviously I'm talking about an MVP to be launched to test the market response . What would be the minimum budget to estimate ? Which coudl be the maintenance and management cost of this platform as it will run after the launch ? How many staff would i require in case of self-management ?