We own the same coach. Hate to tell you, but you are right. The layout and looks are nice. Thats about all that is nice on this coach. It was the first year they made the miramar and it definitely shows they were just thrown together with inferior materials. Cheap parts just don't get it.
I hope the guy who you bought it from didn't buy a Thor pusher. He will probably have the same problems.
BTW, we bought a brand new Miramar and now we have a refurbished Miramar which needs to be refurbished again.
Best of luck to you!!