Custom Spell, Trigger, and Object Help

Sorry if this is in the wrong forum
I have 4 questions.
1) How do I create a spell for a unit that creates an building right in front of the unit?
2) How do I make an acolyte based custom unit move in increments of the same size of a blacksmith [pathing for the blacksmith, hunters hall, etc...]
3) How do I make 1 specific type of unit move by the arrow keys -> move right, <- move left,^ move up, and the down arrow key move down.

This belongs in Map Development.