I have quite a few, cost around 20K ea. Need drawings, schematic, prototype ( if applicable), description. You need to research patents to make sure no one else has it.
I figured the research would be required, but damn that charge. Seriously, 20k?
Most patent lawyers charge about that in my experiance. It's possible you can do it without, but I never had time to investigate and the packages I've recieved I thought, I'm glad I paid, no way I could figure that out , not in my skill set.
Btw I had patents stolen from me when I discussed the idea with a lawyer but never filed. There is a reason why consultation is free - you say too much and don't hire him, he is free to take his "original" idea and run with it.