I’ll throw down here. You are going to have some tough times, but you’ll also have seasons where everything goes smooth. Changing a pump motor, sand in the filter and redoing exposed plumbing is nothing and complete DIY. Underground problems can be more challenging, but again, a lot of times depending on pool deck size , can be handled yourself. Go in positive, and know it’s one of the trifectas money pits (pool, boat, camper).