I'd buy my parent's a nice house with a large backyard. Then create a walk-in pool inside the backyard having a beach/sandy shore design. Probably 50 long 40ft wide and the deepest part will be 10ft deep.
Inside the large pool is a house on a concrete base dedicated to my room, and living space. It will have a walkway to the main house.
Two stories high (3 if roof counts) with a nice view high ceilings. The roof has water escape systems for rain but on hot days it's used as a tanning area or just a place to hang out.
I'll sleep on a second floor with an amazing 180 degree view window showing the flat horizon and patches of hills and trees.
The first floor will contain my office near large glass windows, small kitchen, and dining table enough for 12 people. Maybe a few storage areas, but wardrobes will be in my room.
Next I'll spend lots of money to buy an expensive computer, and a large television.
Work out equipment, and a grill.
Then a Jellyfish tank
