Richard,
The only thing that will stop you achieving your goal (with the possible exception of a medical reason), is you.
If you want to fly helicopters enough, then go for it. If it means working in some other area of the aviation business to get yourself known, then do it. If it means doing a completely different job for years in order to raise the fund, accept it. Even if it takes years.
I don't know about you, but one thing that has always spurred me on is older, wiser people telling me I couldn't do something and proving them wrong.
While the advice given is realistic and well-meant, if you want to do it, then
go for it! and the best of luck.
DBChopper