20 ETH this is the maximum amount that will be required to start the project! If tomorrow 1ETH = $ 1600, then there will be enough and 10ETH! While the project exists only on paper, if this amount is not collected, the project will not be considered successful and the funds will be returned to depositors!
Why you do not make a Token first? and website too!
to make Tokens and websites do not cost much!
Well, that way your project will look interesting!