I have one of these, albeit the sedan version, not aft cabin, but otherwise the same. If the windows have been replaced, and the teak decks taken up, then so far it sounds good.
However, what is also important is, was the deck then reinforced and recovered with new fibreglass non-skid, as mine was.
Also, have there been any leaks down onto the tops of the fuel tanks, causing hard to see rust and holes on top, which is one of the commonest bugbears of the design. Actually a problem with all those Asian built trawler style boats in fact, until they stopped screwing the teak down, and went over to gluing it down.
This results in fuel tank leak issues and often replacement is needed on many of them, unless caught in time. Such a shame too, as would have been so easy to avoid with some forethought re the likely outcome of multiple screwholes into the upper f/glass layer.
Also check for the possible water damage to the interior and walls, as back then the cabin was not f/glass, but a thin layer of mat or just paint over timber, and not great timber at that. The window replacement hints at that being a real possibility.
Having said all that, however, they are lovely seaworthy and sea-kindly vessels and a delight to cruise in. So don't be too put off. Just be alert, but not too alarmed. Much of the cosmetic deterioration can be restored by the DYI approach if you are keen.
