Window Units and Space Heaters

Interesting pic, eh? Yes, this window unit is being held up with a stick - it is too heavy for the window.

Checked out a home with 3 window units in the living room/dining room and 2 space heaters used in the bedrooms, no central heat and air. This is my first encounter looking at a home without central heat and air. The space heaters could be a potential liability - I hear there are some that have automatic shut off. If I end up pursuing this one, I may look into getting more window units for the bedrooms.