@LimenCoyle THe J24 is a fun racer. You will enjoy the experience.
I am guessing here. Is the racing rigging you identify the halyards and sheets for the sails? If so that is nice. My concern would be the Wire or rod stays, the turnbuckles, mast, spreaders and the chain-plates. These hold the mast in place and in a racing boat get a real workout. Usually under normal wear they are good for 10-15 years. On a racing boat it can be 7 or less depending how she was sailed. Getting a professional rigger would be advisable as this appears to be a new concept to you. If not I apologize.
You are looking for metal fatigue, rust on stainless, bad or cross threads on turnbuckles, age and condition, even micro cracks or elongated holes on the chain plates. A mast refitting done by a rigger can run into several boat bucks.(a boat buck is $1,000)
The assumption is that the head sail is on a furler. These get used heavily in racing and get worn. You will want that carefully inspected. Again looking for difficulty turning (bearings) or out of the ordinary issues (cracked metal, dented metal, broken pieces, etc.). A new furler can run $1000. A DIY refit/repair project can easily run a 3-5 hundred dollars.
All this leads to the idea of an old - cheap boat. Only you can know and make the decision. In your case with it being so "Cheap" a survey is not about pricing the boat, it is about how much is it going to cost to repair.
Good luck