Here's a strange one. We've been offered a flight Sim which is a big old sod. The legs are so wide and long that we'd need to sink a hole in the Hangar floor to fit it into. I'd need to cut out a triangle of floor with 30 foot on each edge and then sink it about 15 feet deep before filling it with 6-8 feet of steel reinforced concrete. Any suggestions for a ball-park price for a job like that? Guesses to the nearest £10,000?