See a solicitor and stop trying to save money doing it yourself, with consequences you (and the lawyers here) cannot guess, without precise instructions. The solicitor might advise a trust with your wife holding it with remainder over to the children or the property passing to the children with a right in your wife to live in it for life or equal shares to your wife and children, your wife to live in it for life or at will, or some other arrangement, such as giving to your wife absolutely, but if she has predeceased you to the ,children in equal shares. Who knows ?