Send a message to the owner before you book it and tell them you will need their documents to submit a TM30 (if you do??). They will soon tell you whether they will provide them or not ;)
You know what he means ;) especially as he wants to get it in country. Non O and extend. "Retirement visa" is a term that has been used for decades ;). OK it is not correct, but widely used.
Make sure you return before the expiry date of your 60 day entry stamp OR extend for 30 days and get a re-entry permit at the same time at immigration.