I believe that for accomplishing any project the most important thing is trust, proper communication, honesty and at last knowledge.
It is not necessary that you have all the knowledge of each area of work. If I am bidding on any project that means I am 100% sure that I can do that project. It might be possible that I do not have relevant experience but in DATA ENTRY/VIRTUAL ASSISTANT project, if the client can guide me or give some clear instruction, I strictly follow them.
I have a small team of 7 members, if a client requires me to work exclusively for them, I can also do that.