[jba]

1 isn't that rare. there's like a 10% chance that he will sell it and a 10% chance that the buyer will actually want to live in it (usually it will be investment prop for him). so you don't really have to worry. he's just putting it in because he can.

2 never heard of that before but dont worry about it if you're paying on time

3 pretty standard for both the clause and the non-enforcement of it.

4 totally standard for the clause. he'll probably be fine if you have someone else move in, just redo the lease. he just wants to be able to approve anyone that comes in.