You did very well apprentice!
HTM answered everything very well for you. I would only add a couple of things. Swim spas are the fastest growing aspect of our company right now as large, inground pools have a much higher operational cost not to mention the gross amount of money to have one built.
They offer everything a standard pool does with the ability to splash around and have fun, the therapeutic aspect of 2 therapy seats and the obvious exercise characteristics of allowing everything from small children to olympic athletes to swim and train in. Combine these benfits with a product that takes up much less room the yard and is far easier to maintain and much less expensive and you have a
Hydropool Swim Spa! 
Cost of these units will vary from location to location Ray due to shipping costs, overhead, profit margins needed to sustain business along with many other factors.
In Canada, the pricing is approx. $15,000 - $25,000 for these units. These can be placed on a flat level surface much like a spa and can be ordered with a beautiful cedar skirt. Often people will place it on the ground and build their deck up to it and the result is a great addition to any yard!
Click here for a variety of installations;
http://www.hydropoolhottubs.com/dealer_swimspa_gallery.htmlThough these are larger units, historical data shows average operational costs closer to $75 - $100 per month through the typical Canadian spring to fall months.
Steve
