Marc,
Regarding the editor, the prices you mention are quite low for most
professional editors and probably no editor in his or her right mind
would accept a deal for a doc with points share unless you are
Michael Moore or Ken Burns. That said, there are often professional
editors who are looking either for a labor of love, a project which
addresses a pet social concern of theirs, or something to expand
their portfolio (i.e., someone who does mostly corporate work or
Discovery Channel-style docs looking to work on a creative doc) for
lower pay than they are used to getting. You might even find someone
to barter with (e.g., an editor who wants to direct a film, but who
needs a cinematographer). Key is finding someone who you can sell
the project on with your enthusiasm and passion. You may end up
having to work around his or her higher paid schedule if you go this
route, but it may be worth it to you financially and professionally
to find someone who is as passionate as you about the subject.
In terms of ownership, has the group actually asked you to make a
promotional film about them? As you spend more time with them and
get their trust (presumably your main character can help be an
advocate for you), you can diplomatically state that what you are
making is a documentary and you want the film to reflect the reality
of what they are doing without being compromised by coming across as
an advocacy film. Very often, a doc can be an even more powerful
advocacy tool than an informational video because it is made with an
outsider's eye (a recent example is SEEDS about the Seeds of Peace
Camps; you may wish to contact those filmmakers for their
experiences - link to the website is at
<
http://mergemedia.tv/projects/t2project_seedsdoc1.html>). You can
always promise to have a sneak preview fundraising premiere of the
film on behalf of their organization or share some of the proceeds of
a screening or allow them to have a certain number of free copies of
the film to sell or give as a gift to funders, but the key is that
you need to retain creative control.