Yes, if you are working with club season, you can get those points for FAR less.
I did a quick Redweek lookup for buying AT Lagoon Tower, something of a worst-case scenario price-wise, allowing for Home Week ownership, and it was STILL way, way, less expensive and/or better than the offer made to the poster. This would allow the poster to get more than twice as much (more points, every year) AND home week in Hawaii (meaning access to prime times such as Spring Break and summer, important if you have kids in school) for about $2,000 less.
Simply put, if you want to spend $30k, you can have every other year 1-bedroom in GI (buy from developer), or every year, 2 bedroom ocean-front in Lagoon Tower (buy on secondary market). If you have flexible travel dates, you can probably get those same 9600 pts for a third of that amount and use club season, though that's less flexible and less sure.