There's no open source projects like that, you'll have to hire developers to build this service from scratch. Your server will receive unsolved captchas and give them to your workers for solving, and then send back the result - this process must be as quick as possible, because captchas quickly expire.
But the biggest challange is starting this business - you need to have workers available 24/7, so you'll have to operate at a loss at the start, because there won't be much clients, but you still have to be ready, because missed captchas could hurt your reputation.
Just to add-on to this, you may be able to leverage the workforce of sites like Amazon MTurk (provided their terms permit) and other microworking sites (at-least until you build up the workforce)
I will 100% pay to get the site developed. I just want to make sure I hire someone who knows what they are doing (I got like 6 PMs from people saying they can do it for $200 in 2 days!). Just want to make sure I get someone reputable.
Then figure out where I get the inventory (People willing to pay for the captchas that are solved)
$200 in 2 days is just unrealistic for this kind of a project, if you want to hire someone on this forum, make sure to only deal through escrow and hire someone who has a good history of delivering non-trivial applications. Despite the seeming abundance of coders here, it's probably quite hard to find someone skilled enough, so you'll probably have to check the mainstream freelance platforms or contact some software companies.
I'm a developer. 100% the product you are going to get is going to either be something put together via some sort of shitty script, developers are going to be well-below subpar, or you're going to be scammed. $200 is not enough.
