Looking to go to St. Lucia in February or March?

Trying to plan a honeymoon to St. Lucia in the next few months while the weather is still good down there. We are also trying to do it sooner than later, in case the wifey gets pregnant ;). Is this doable to find a luxury resort with a 10-15k budget? Or would it be worth the savings to wait and find a deal for later this year or next year? I've checked a couple of the higher end ones mentioned here and they are either sold out or $25-30K for 7 nights! Thanks in advance!