I have talked to several real estate lawyers and a few accountants and no one can give me a definite answer. Everyone seems to be telling me something different.

Here is the situation.

My parents are looking to purchase a new condo. Either 1 through assignment that closes in a couple months or 1 to 2 pre construction units that close in 2014.
If they treat this as investment property with intent to rent it out right away what kind of taxes (HST) would they have to pay on the purchase, and how much of this is refundable. I have heard rates such as 1.5%, 7.8% and 13%. Some people have said they get all of it back up to $24,000 per unit and some have said they only get up to 6% back. Everyone is giving me a different answer :S

Option 2.

The condo is purchased by them. But one of there siblings who are over 18 will live there for a bit. Since it would be a principal residence we would not have to pay any extra HST.. Say the sibling moves out and then they decide to rent the place. How are they effected? How long does the sibling have to live there? Can the property still remain as principal residence or does it have to turn into rental unit.

any help is appreciated.