Section 65A of the act allows you to transfer common property to an owner using an exclusive use bylaw which only requires a 75% vote for approval. This would be a permenant transfer to the lot and it could only be resinded with that lots owners written approval.
I would expect the owner to pay all costs AND a payment to the Strata (admin fund say) to cover the value of the land transferred. This is one situation where the required bylaw should be written by a qualified Strata lawyer.
Not sure of the advantages of a lease / over a straight forward Exclusive use bylaw. The actual sale option seems to me to be a non starter as it would be too expensive and complicated, whereas the exclusive use and lease are designed for effectively this purpose.