Everyone thinks they will be the next big billion dollar company. Ideas are worthless without execution. Part of the equity equation will be based on the founders, their track record and how far along the idea is. Other factors include the market, your timing around fundraising and if you have an...
It's very difficult. I would start with angels -- I think traditional VCs will not do it at all due to financial regulations and lack of physical presence. Try AngelList. Try for 500s or other groups which specifically like to invest outside of America.