Answers

Great questions. Answer will depend on your overall renovation budget and projected use of the pool.

You may wish to track your use and cost (maintanence, electric, water, personal hours cleaning, chemicals)  for one year to help assist you with a renovation option.

Direct added value to your home:

Finish out unfinished living areas

Upgrades to bathroom and kitchen

Add additional living area

All other items completed to home have negligible value added benifits in terms of Apprasial added value.