For a two week rental, your best option in Placencia will be AirBnb or VRBO. You could locate a few places on those sites and then contact them direct and see if they will offer a multi-week discount. However, February is busy season here so most places may not be willing to offer a discount. Here are a few places the come to mind that you could take a look at:
Alaska Reprieve
Bella Sway
Bella Vita Casitas
Casa Valencia
The Flying Toucan
Lazy Palm Suites
Sea Glass Inn
Seabird Villas
Serenity by the Sea
Silver Leaf Villa
White House Placencia
When you are here, be sure to swing by and say "hi" at Placencia Beach Club.
Shane Kenny
IL Belize Correspondent