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The site inspection kicks off with telltale cracks that spell disaster, but the newly-minted hoteliers embrace the bright side of demolition as they create a luxe tropical oasis from scratch. Also, the family makes time for a magical beach celebration.

Work on the sewage system opens up a budget-busting sinkhole in the yard, and the build falls a week behind schedule. Steph gets creative and kicks the honeymoon suite into turbo mode, and Luke promises a solution when the windows arrive without screens.

The race is on to complete the poolside guest rooms, but Luke's progress is threatened with a red-tape snafu that brings work to a standstill. Also, a celebrated mural painter has a vision and the family heads into the rainforest for a zipline adventure.

With work on the pool area at a standstill, Steph and Luke kick the garden rooms into high gear. The pool bar gets under way, but the garden plan hits a concrete roadblock. Also, Luke's parents arrive in Costa Rica with plenty of love and encouragement.

When catastrophic news threatens to derail the entire project, Steph and Luke come up with an emergency plan, but it all hinges on completing the casita suites. And now that they're down to just a few thousand dollars, it's game on for a critical reveal.

With just days until the combined wedding and grand opening, the team kicks construction into overdrive. The knockout pool bar surpasses expectations, and without a minute to spare, it's two celebrations in one as everyone heads to the beach at sunset.