Going to be ordering my log cabin soon which is 4 meter x 3 meter. Been revising variable options for a base but have come up with one what I prefer to do if it is ok. I am going to buy 8 post holders in the link, then dig 8 holes 2ft deep fill mainly with hardcore and sand then whack down. Then put 100 mm of concrete on top let set then screw post holder to concrete the . After that cut 8 piece of 3 x 3 timber and place in posts then cut lengths of 4 x 1 and screw to post to make base, then sit log cabin on that. Would this base be ok ?