Again, the condition of the pool is critical, and, as you know, the liner is a throw-away.

Things like a skimmer basket are trivial--all the pool stores selll them--don't worry about it. Even if you have to replace the whole skimmer, it's not going to be a major expense. Even replacing the filter and pump isn't going to be a big deal. There are lots of inexpensive combos that will work well--you only need 1/2 to 3/4 hp on the pump for that pool.

HRSDennis has given you, I believe, good advice. If the support system and the pool wall are sound, then it's a do-able project.

I also have a bias for ovals over round pools. IMHO, I think you get a lot more pool for the money--and a lot less water to maintain. You can actually swim laps in 33'--you cannot in a 24' round. 18'x33' has about 13,500 gallons (approx)--exactly the same as a 24' round, so the filter and chemical costs are the same. The length makes it easier for games as well.

There is an issue that a round is structurally stronger than an oval, while this is true (simply physics), ovals compensate with extra side-wall supports. Many ovals EASILY last 20 years or more. You'll be replacing the liner by then and can fix any problems!

If it's a good, sound pool, I'd say take it. If it's in trouble, well, maybe not.

I got 3 years out of an Intex EasySet 15' donut. While I regularly had to replace the hoses and clamps (all of $20/season), and get a new cover every 2 years (another $30) the basic pool never showed anything more than a little fading. I expect if I hauled it out, it might STILL be sound...but I'm not going to, just yet.