Is it printed on 1 continuous roll or broken up into panels? Regardless 3M 180-10 has a pressure sensitive adhesive and is relatively easy/forgiving to work with. You can pretty much pull it up and reposition it depending application, just make sure the surface is thoroughly wiped down before hand. That being said you’re talking about close to $750.00 just in material substrate/laminate/ink. If it's 1 piece I would say pass on the job until you’re comfortable doing something maybe half this size. If it's paneled you'll be fine, take your time and you'll love how the pressure sensitive 3m 180-10 lays down.
As for pricing I would probably be around $450, but you'd be amazed if you knew how much this out of town company is getting to do this job.