Complex sentence: All of this was very costly and despite his land holdings, Lord Balfour was financially ruined and in June 1634 sold his estate for a little over £3,000 to Sir William Balfour, keeper of the Tower of London, probably a cousin.
Split into simpler sentences: All of this was very costly and despite his land holdings, Lord Balfour was financially ruined. In June 1634 sold his estate for a little over £3,000 to Sir William Balfour, keeper of the Tower of London, probably a cousin.