Chicken or the Egg? Hangar or Plane first?

Hi, All;

Seriously considering first purchase of an aircraft. In no rush. I'm
curious, though.... If you're in the plane-buying mood, when do you get the
hangar/t-hangar/tie-down? Before you sign or as a condition of sale? Do most
folks selling aircraft agree to wait until you can line up a parking spot?

Some areas of the country are quite short on tie-down/hangar space, and I'd
probably jump into a great deal on a plane, then find no place to put it!!!

Thanks;
Carl