In the first level, named "Underlook Hotel", you'll need to build a level 5 De-Lux clinic. The bigger the room, the higher the prestige, but you can obtain this using a 3x3 room if you're short on space.
Before you build the room, make sure you've unlocked/purchased the Gold Star Award. If not, you can purchase it via the Items panel for 200 Kudosh. It'll cost $50 to place each time, but it will add extra prestige to your rooms which will greatly benefit you in this instance.
Decide which size room you'd like, then add the necessary machinery/furniture. When you're happy, spam the walls with the aforementioned Gold Star Award until the room hits level 5. Now, build the room and the achievement will unlock.