I do not work on pools, but used to have an in ground with vinyl liner in my home.  The first thing that came to mind when I started reading your post was switch to salt water.  Then I read that you mentioned that!  I don't know all the benefits why you should, but I thought the largest were that they are easier to maintain and don't require as much chemical as a chlorinated pool.  Some people I know say that they are much more enjoyable to swim in as well.  

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.

Galloway Roofing & Siding does not work on Pools.

Start by doing some research for your local area.

What type of pools work best for your ground condition; Gunite, Fiberglass, Vinyl Liner, Above Ground, etc?

If it is gunite, what style do you want; Freeform, Geometric, Lagoon, Modern?

Do you want a spa?  Do you want a waterfall?  Do you want to heat your pool?

What materials catch your eye?

Create a portfolio of pictures of pools that you like, this will help the designer really understand waht you are looking for.

Check out the companies that you call.

How long have then been in business?

Are they members of BBB?  Rating?

Do they have an office or do they work out of their house/truck?

DO they have insurance?!?

Loop Loc is a great product for safety fencing around pool areas. 

There is several different places you can purchase these. Walmart has some option, home depot, bed bath & beyong, etc. Maybe check these places online and see what they have. It would probably be very simple for you to find the best product online, otherwise try calling one of those store to ask if they have any in stock!

Start by deciding if you'd like to have an above ground pool or below ground pool. There's gotta be a significant cost factor there I'd think.

Yes you really should.
With freezing temps, frost, and the funny movement of the earth and setteling its best to just do it right the first time.

Pour a 4" slab with some 18" OC Rebar (18" on center).

Hook up the 220v with a dedicated breaker and walk away knowing that it will last for YEARS!

You should decide if you want above ground or in-ground.  If you decide to go with in-ground, you should do some research on vinyl liner compared with concrete.  :-)  Good Luck!

Search for "barn movers". That may be a good place to start. Also, ask local spa companies for recommendations

!

I'm not familiar with cartridges but you can buy an aromatherapy canister (hot tub warehouse online has them) in which you put aromatherapy beads whichare available many places (such as spa depot). You can add aromatherapy beads and liquid directly into the spa as well.

Safety Covers are the best swimming pool covers. Insurance rated. They will protect Children, Pets, Adults and make for an easy spring cleanup. www.atlantapoolsafetycovers.com