Sounds like you need to bring on an experienced producer or executive producer, who is keyed into the film industry and can guide you through completion. You're saying you're not interested in grants, but regardless, all the things you're seeking (professional assistance, equipment, etc) would be much easier to acquire if you had a budget with which to acquire them. Additionally, though granting is highly competitive and is in no way a sure thing, it does force you to collect your thoughts and sample work in order to pitch your project to those with not only funds, but connections and other means of helping you to the next stage. Even grantmakers without an official lab program, will have an incentive to help you advance your project. Receiving a grant also demonstrates the potential of your project and helps rally other support. This is one of the best ways to take your project to the next step.
If funds are really not an issue for you, I suggest you hire an experienced Producer who has worked on similar project and has a connection to international broadcast networks, etc. If your project is not funded, why not apply for grants? It can only help.
In the meantime, Cinereach has a grant deadline for feature fiction and nonfiction films. It is open to international filmmakers at any stage of the production process. Sounds like you are new to the field, but if you have compelling sample work to show, and it is in line with the Cinereach mission, it is worth filling out our short, two-page letter of inquiry form and submitting a work sample. Here's the how to apply page:
You might also want to explore Britdoc, The Fledgling Fund and others like them. We also have two resource lists on our web site that you can explore:
Best of luck,