I’m closing on a house that has this type of pool, and I’ve had two pool repair companies that aren’t familiar with these types of pools that have quoted me 20k for converting to concrete pool. It’s an indoor pool that has been closed for 5 years, and was operational when closed. I did have someone offer me a quote to tile and paint pool for $3500 but I don’t feel that is correct for this style pool. Can someone advise me what to do, and building a new pool is out of the question for us. I’ve included a photo.