Can the money for a NON-O-A visa be kept in a home country bank for two years?

Some here have theorized that it might be easier to return to home country every 2 years less a few days and buy a new non o-a visa which can be stretched to almost 2 years and the 800000 can be in the home country bank ! My question is : can the money be left in the home country for both years or just the first year only? A friend is returning to Britain in April and may be interested in this !method of avoiding some of the confusion as he goes home to see grandchildren at least every second year!