The things to think about here if you are running a studio to make money are, you have to understand the difference between "mixing", "producing", and "audio editing". Each needs to be treated differently and you deserve to be paid for each one.
It is not my job to produce a song if I've just been asked to mix it. It is not my job to edit all the crap that the last engineer failed to do if a standing project is brought to me....and if you find yourself cleaning up your own projects spending time with slip editing and fixing pops and clicks, you're failing as an engineer.
Melodyne is production. It should have nothing to do with mixing. Specify what services you include with a project you work on. None of the stuff you mentioned is mandatory from a mix engineer. Anyone expecting that from me if I'm just asked to mix will be sadly mistaken. It only walks hand in hand if you allow it.
Now, actual mixing of a project for sound excellence, realistically it should take 4-8 hours. So 10 hours for all the stuff you mentioned is actually pretty good. Then again, I've never heard your stuff so in actuality, I don't know how good the stuff is. That's not meant as a dig, it's just being real. People work on editing and production for days and then mix for 3 hours. Sometimes they do well, other times they totally tank.
Some rules of thumb that I do that you may want to consider taking on board with you.
If you are taking on projects from other studios and cleaning up another man's garbage because he was too lazy or not knowledgeable, doing it for the love is ludicrous. Charge for that. Just think what you could have been doing with that time.
Don't be the producer unless you're asked and paid for it. Mix engineers are just that and should remain in that frame of mind unless other arrangements are made. You'll save yourself a ton of grief, trust me.
And lastly, audio editing, slip editing, cleaning up crap and fixing pops and clicks all over takes time. Again, it's ludicrous to fix another man's project and not be paid for it. Don't assume this responsibility unless you absolutely have to.
And one more little thing....when you record someone, practice proper audio editing as you record. Cross fade every punch when completed, slip edit all clips following the print, and make sure your signal levels are where they need to be. When I record a project, there is never any audio editing needed other than if I am specifically asked to replace drums or work on comped tracks where the person has no business recording, or by request of a record company or producer. When people record here, they get it right or they don't get it at all. If you want comped tracks where I have to glue your performance together, you pay hourly for it. It's not included in the project price. Why should I have to suffer for poor performances?
That said, there are times where we record a vocal line 5 times and combine all the best takes. However, I don't substitute word at a time stuff unless asked. And again, stuff like that, is a manufactured track that they pay for. Drum editing, drum.replacement etc....they pay for that. Seriously bro, why should anyone just include these services due to imperfections or when someone may want to be something they are not? Pay me for audio editing, I'll make you sound like Prince, Mike Portnoy, Geddy Lee or Eddie Van Halen. :)
These are the things you have to ask yourself. I do this for the love too and have helped several people in need when I was able to. However, there are some things in this field that are time consuming and crazy to do. You have to be a good judge as to.when you take on stuff like that. If I did all the stuff you do without charging someone, I'd hate what I do, and would eventually quit or be forced to close my door as I would not be able to meet the needs of my other customers waiting in the wings with bookings. When you have projects that need to be done every day, you learn how to work smarter not harder and you HAVE to have rules like I mentioned or you just won't be able to survive.
Whatever the case, if you are doing all the stuff you mentioned and are happy with your results, I'd say you are ahead of schedule. :)
-Danny