I found that the tint had to be applied in two pieces to the corner windows of my 54-5 window. Fortunately, my step-son is a professional tint applicator.....has done some of the most complicated vehicles on the market and it took him better than an hour to get them to his satisfaction.
Basically, there is a seam, from top to bottom that is virtually invisible, splitting the window into halves. By using the 2 piece method, he was able to get it perfect. It's been on almost a year and it looks as good as the day he applied it.
I would not be a bit surprised if a tint shop would charge you for a full tint job.....their time and frustration are probably not going to be cheap! Hope this helps.
Dave