As what my niece said you can only own 4 hectares of agricultural land and you can own many houses as you can.
You can use proxy to put in the land title for another 4 hectares such as your sister or mother but you need also a writen document that state you own the land in seperate, to avoid trouble in the near future and both parties should sign it.
My niece own 8 hectares of coconut farm and 3 houses.They rented the 2 and they got also another 4 hectares but its a (prenda) and if the owner cannot redeem at the time of the agreement they will just add an amount to it and considered it sold out.