This smells like a debacle waiting to happen.
From the description you gave, I'd think of you as most likely an overoptimistic get-rich-quick schemer who wants to get somebody competent to do a lot of work on your idea while being micromanaged, in exchange for an inequitable share of profits that aren't going to show up. I'd also worry that you'd get discouraged too soon and not pay me for work done, or get upset and potentially abusive if it doesn't work as planned because of your emotional investment. I'm not saying this is what it is, but rather the impression I get. Reread what you wrote: if you can't see why I might get that impression you need to work on your communication skills or your perspective if you want to get somebody interested.
Now, in order to get somebody rational to go along with this, you need to convince them that there is a very good probability of enough profit to make this worthwhile. If you know somebody personally, and can work well with them, you could try that. Otherwise, unless you have good sound business reasons for your venture, you're talking to a bunch of people who can't easily tell the difference between you and the myriad hordes of wackos who sound just like you.
If you do have good sound business reasons for your venture, you can go to a bank and talk about a loan so you can hire somebody. This will make you much more credible. First, you will prima facie have a good business case, since you've convinced a banker. Second, after getting the loan you will have skin in the game. You'll be in a position where failing will cost money and reputation, and therefore you'll be less likely to fold when the going gets tough. Third, you'll be able to pay for things like hosting and marketing, so the whole thing is less likely to crash immediately. Fourth, you'll be able to pay at least a small amount to anybody you take on board. (You don't necessarily have to pay market rates. You could pay primarily in profit share and/or equity.)
And remember that you can't be coy about your project. You're going to have to tell lots of people what it is in order to have any chance of interesting a very few, and you're not going to be able to get them to sign an NDA. In successful business startups, the idea is not particularly important, it's what you can do with it. Ideas are cheap and plentiful, implementations done with skill, diligence and determination are neither.