Maui is one of the easier places to look as almost all of the resorts are simply fantastic. Unfortunately they can be fairly expensive. So use this link for all of Maui and fill in the amount of guests and date. Then select in order of price and scroll to the budget you are willing to spend.
here is the list of all the Condos that are in Lahaina. , I added some comments for the most reasonably priced ones, hopefully this helps