Hi BethyM and Welcome to the Forum. I agree with Aylad. 2Hp pump is over 2x what I think you will really need.

Depending upon your location, end of the season will usually bring closeout sales and bargains. But those items can be what they couldn't sell to anyone else for a multitude of reasons. My advice is to know what you are shopping for and try not to settle for what's on sale. I would definetly look for a smaller Pump/Filter package.

FWIW, SWCG's work well in a Vinyl lined pool. $5k sounds a little pricey to me for 27' even with install. What part of the country are you located in? Post back with a break down of the costs by Pool, Filter, Labor etc. if you can and Brand names would surely help.