hi akthar
about the unlimeted residency
you can get the residency by depositing $50,000 in the bank,then you can withdraw $25,000 and as long as the $25,000 are in the bank you can renew your residency every year.
i am reading the law for the immovable properties now and i'll write to you when i finish.
if you need anything else i'll be glad to help 