The whole thing, no neighbors, you control terraform, media, access and all the rest, its all yours! http://slurl.com/secondlife/Serendipity%20One/250/246/21 Pay the rent box, contact Black Ort to be get the rights, and do as you want!
Last month I turned two HS into one Full, with no trouble. I was careful in the ticket to specify which HS to kill, and which one to turn into a full, and it went great, with nothing already present in the sim being upgraded changing.
I have 50-some merchant renters in my Market, and the reaction to a change of rental rules banning all IP loggers such as Redzone and CDS, etc., was enthusiastically positive.