need help with our new house

[myfs_148895]

My in laws have built a duplex for us and my husband's brother. We of course had no idea about the plan. It was my mother-in-law's design. I have read a book in feng shui but I just got more confused. Like how do i position the bagua with the main entrance. we have four gates, one for each garage and one each for people's gate entrance. we have shared lawn. it was my in law's decision not to put division in the garage lawn area so that my kids and my brother-in-law's kid would have a larger place to play on. The main door to the house is not aligned with the gate. it faces to the left on our side and mirror image for my brother-in-law's side.
another concern is having 3 storey house. does bagua apply to all 3 levels? and if my positioning is right. our career side would be the stairs? so it's hollow. how do i cure it.
I'm also planning on working in the attic since it's the only place in the house big enough for my sewing machines. we placed a small room there too for the maid since my mother-in-law didn't plan on putting a maid's room in the ground floor.
I need advice because i want to start my business in the new house. It will be finished by end of february.