there is a list of long arm quilters here on the board- go to the list- find a few in your area and pm them your questions---location matters- skill- experience- lots of variables---some people charge by the quilt- some by the square inch- ...some provide batting- some do not- some charge for thread changes---everybody is different-- the only way for you to find out your answeres is to ask the people who are near you you may want to use-
turn around time can be anywhere from a couple weeks to 6 months or more----check with your local quilt shops- guilds---they will have long-armers to recommend also