Rusted Frame and leaf springs

I was driving down the road when I heard metal on metal looked under my 2008 Tacoma Off Road and one of the leafs was hanging off towards the drive train so I went to my T dealer and he said good news you qualify for new leaf spings "oh by the way let me check your frame he said its fine no holes so he gave me a rental RAV4 and said the springs would be in a week the came in,great job, installed but you have to come back for the spraying of the frame. Now it's January and no word I had a death in the family and had to go to Fl. So I got home and got the message to bring the car in for spraying as they were cleaning off the frame a 3 inche hole show up so now I need a new frame he informs that Toyota is paying for everything frame,springs, ect Oh by the way I have almost 200,000 miles on the truck. I just can't believe that they are willing to sink almost 15 grand into repairs at there cost . But what I found strange is they let me keep my truck while I am waiting for a new frame anybody heard of this