Curious, wouldn't a "utility token" be what the OP is looking for since his project won't be utilizing a coin as a tradeable asset in the end? That said, as you noted crowdsale contract through ethereum is OP's best option.
A "utility" token is a token that is necessary in order to use the service. A "security" token is a token that works like a security - you don't use the token, you just hold it as an investment and you get some kind of return. Since the OP doesn't have a good use for tokens in his service, a security token would be the appropriate choice.
Also, the primary reason for a utility token is to get around being considered a security. (That's why there are so many stupid projects that use a utility token for a service that doesn't need its own token.) But now that the SEC has stated that they consider a utility token to be a security, that loophole no longer exists (at least in the U.S.).
Yes bud you can still do ICO even if you are not going to offer any coins. For me thats crowdfunding and you collect funds for your project.
You can't do an ICO without coins. ICO is Initial
Coin Offering.
