newbie leaseback buyer

hiya anyone that reads this

my wife and i are looking to buy a leaseback property for our retirement ( being in our late 30's ) and we were wondering where the most up to date sites are showing developments.

we have seen quite a few we like but they are all sold out!

also as i will be taking out a second mortgage , can i use my house as collateral ?and is it like an english mortgage where you have to supply bank statements , payslips etc?

i'm looking to put down about 30%deposit

also can you extend the lease after the term is up?

thanks for any information

and merry christmas to all in advance

BIRDEK