Just like “How much will it Cost?” the answer will be different in each case.
If the project is required for a special event, for example a birthday, reunion, Mother’s or Father’s Day, sufficient time will be essential as I would not compromise the presentation of the research.
As a general rule I would say at least six weeks is required for an ancestral line. Of course smaller projects or reports would be less.
I can give you an approximate time frame after we discuss the final outcome you’re after.