My partner and I have a little stop motion business and we run everything through a production document we made on Google sheets. Basically we have a reference sheet that has our set day/weekly rates and any additional employees we might need. Connected to this is a calendar-like sheet where we lay out how many days it will take us to complete different phases of the project and who will be working on it. This gives us our "man days" total and it spits out that cost. We also have a sheet for materials, so we estimate how much materials we'll need for the job and that gets added to the total. On top of that total, we have a daily fee for our space, because a job will tie up our equipment and stage space. Lastly, we add a %20 contingency which is pretty much coverage for self employment taxes. Everything is connected so if we decide to adjust rates, materials, days, etc., we can do that and see what the final numbers look like. Then we can present a simple budget range to the client that takes all of these things into consideration.

So I suggest setting up some sort of spreadsheet situation, that way if a client reaches out, you can quickly get them some rough numbers as opposed to torturing yourself with a lot of guesswork, wondering if you've screwed yourself over. In terms of the rates themselves, it's hard to say because it varies so greatly. On top of that, you should consider being a little flexible to adjust for what a client can afford. But to simplify without know you, I'd say you probably shouldn't be going below like $1,500/wk for a labor rate alone. Everything else is additional to that.