Puzzle 212: Handicapped Guards

This is a new puzzle type.I constructed two puzzles of this type,one in august and an easier one this week,which you can see in this post.

Rules:Clues represent guards.Some buildings - rectangles 2x2 or larger- are hidden in the grid.Buildings cannot occupy the clue cells.Buildings do not touch each other even diagonally. Guards can see all the cells that are not blocked by buildings.Guards themselves do not block other guards's view.Not all guards watch in all directions.Some guards watch in 1 direction only, some in 2,some in 3 and some in all four.The small numbers indicate how many directions the guard is watching.Determining which directions a guard is watching, is part of the solve. Number in big font is the total of all cells that the guard can see(not including the cell with the clue).