Trying to nail this down can be a hair-pulling experience. I know estimations are a ridiculously hard thing to do, but that's kinda the reason I'm engaging them

Trying to nail this down can be a hair-pulling experience. I know estimations are a ridiculously hard thing to do, but that's kinda the reason I'm engaging them as an expert. I also know they want all the work you can throw at them, but just getting a sense of whether this is a 1 hour or 5 hour gig so I can evaluate the ROI before briefing it in is impossible. This is one of the things I want to address (my side-gig doing marketing consultancy) - one rate, whether that's strategy or design work, up to the client how to use it (and telling them to use someone else if not good value).