I was told In 11 days I can file for possession of the property.

And, in most cases, even if they don't redeem, the original owner can retain possession of the property for at least a year after the tax sale until the tax deed buyer forecloses their redemption rights.  

Like they said, they cannot restrict you reasonable access during the inspection period (or you can definitely get an extension).Thoughts: less possessions and them fixing stuff is good for you.

They don't really care who you are or who owns the property.The rents will be apportioned at closing between you and the seller, and the day after you have possession, trot your happy self to the housing authority and do the paperwork.

When I took possession I told the tenant she had to go - she was mess anyway - and I told her I was going to renovate it.

You may have to buy the property unseen (so give yourself enough contingency)4) Some of the Auction properties come with possession at closing.

Typically whatever is owned by the seller becomes the buyers upon transfer so you immediately owned them upon sale unless stated otherwise so the renter should have no right of possession there.

The legal possession of the premises has not been rendered back to you.

Underwriters will take that as holy writ after the suit is put to bed.Adverse Possession (AP). 

@Michael Breedlove handling management and sales in the metro area, my experience is like Nathan G. regarding the notice to vacate, give written notice and keep it short, no apologies needed. you simply want possession of your unit.