Since you started ... i just chip in.

factor that people often over look is that the property birthdate [yes they have a birthdate] is determine by the first day that a person move in to stay.
So to say, when you buy a new property, you need to see the chart of the building on the year that it is finish and can move in, often is 3 year down the road. when you buy sub sale you need to find out when was the building first tenanted, which could be a few year back [you need to dig all previous SnP date back to the first date.

over looking this you will be staying in a house and planning a wrong chart. the yearly chart will interact with your natal chart. yearly chart move, so quality of chi will change yearly. your front door is good this year and bad next year. its more important to get a good natal chart that suits you.

its actually good to buy those property with 2 door, normal door and sliding door. chances is one of them will always safe to be used. you switch accordingly on yearly basis. 

if you are buying to stay yourself, do take note of the actual date. if its for investment basis, forget about the date, let the future tenant/buyer worry about it.