you mentioned there's a lot of humor. that makes a huge difference
when you're dealing with a potentially grim subject.
i co-produced a film called "silverlake life" about two gay men dying
of aids who kept a video diary of the last year of their lives. it
was hard to tell at the time what kind of film it would make but it
turned out very successful -- grand jury prize at sundance, premiere
program of that year's p.o.v. program on pbs, theatrical release in 80
u.s. cities, among many other highlights.
so i say... go for it! good luck.