The garden is 220 * 120 = <<220*120=26400>>26,400 square feet.
The tilled land will take up half the area, and the trellises and raised beds will be the other half. Each half is 26,400 / 2 = <<26400/2=13200>>13,200 square feet.
The trellises will take up 1/3 of the remaining land, so the raised beds will take 1 - 1/3 = 2/3 of the remaining land.
So the total area of the raised bed area will be 13,200 square feet * (2 / 3) = <<13200*(2/3)=8800>>8,800 square feet.
#### 8800