You are being cautious which is a good thing as these vans are a lot of money. Every van out there will have some faults or issues, the perfect van doesn't exist. As mentioned, you must know what you want a van for and if you are going to work on it and maintain it yourself. Old vehicles can be a money pit on top of the purchase price. Expect that. It may seem like dead money, but think about hiring a T2 to learn about their pros and cons, in an unpressured situation. Maybe a T2 is not for you at all, maybe a more modern camper would be better overall. There are folks on here with T25, T4 and T5 so would be able to advise you.