Identify the actual problem
A leak, worn lining, cloudy water and unreliable equipment need different responses. Describe the symptoms, when they started and any previous repairs.
Look at connected work
If the interior needs renewing, it may be practical to review steps, edges or equipment at the same time. That does not mean every element needs replacing.
Choose the scope in stages
An assessment helps separate essential work from improvements you may want later. Photos and a history of the pool are useful, but some issues need closer inspection.