Hi people.I am building a 16ft x 10ft log cabin in my garden.was unsure on what I need to do for a base.firstly how deep a hole to I need to dig?was thinking maybe have the base slightly above ground level to ensure the log cabin remains far enuf away from the grass.what do I need to make a base?and how much of it would be required please.if anyone knows of any good websites that are resonable for supply's that will delever to postcode pe13 that would be handy too.