there use to be a good prelude only forum hondaprelude.com. but it's gone.. and there is preludeonline.com which you must pay $6 for....
the only major thing i had go wrong was that my engine fried.. LOL.. this sounds bad on my part but the crank shaft was going.. and no one could tell me what the noise i was hearing was until the engine blew up... just do regular tune ups etc... make sure you get your valves done as well... i'm doing a jdm engine swap.. i had always wanted to do the swap before the end of the year before my engine died...
otherwise before the misshap the most i ever spent was getting a new set of tires and the timing belt....
happy luding!