Asked in Building in Thailand group or just search in google for refractories most of suppliers are in chonburi province. Type of brick you are looking for if you want to do properly is SK 34
Ok got two basic choices. Forget company route if they crack down on that you could lose everything.
You can get Usufruct agreement with your name on the chanote that gives you a lot of protection and in case of your wifes demise you get one year to be able to sell it. (Need lawyer to set this up)
if its just for a holiday then UK probably easier presuming she has good job, property etc etc. My wife when she was my girlfriend got her own tourist visa and met me in UK for the weekend