I'm not aware of any weak spots in a
Surfside (I've only had one), just the usual things in a 31 year-old trailer... door hinges, leaky
windows, wiring issues; all easily fixed. The
axle may not have a lot of boing left in it, not usually a big problem. The most difficulties I have had with my trailer have resulted from questionable previous renovations, so I would say that the cleaner and closer to stock the trailer is, the better off you are. Enjoy your adventure.