Started peacefully with one a few years back. Now I have 18 spread over 6 apiaries. The spead is good because its easy to move bees over 3 miles but its a long day if I inspect them all.
Its not the inspecting that the issue, its that they all do stupid things at the same time!!
How about this for a theory:
Workers are always produced from fertilised eggs. This is Diploid as it has two different genes.
Drone are produced from unfertilised eggs. This is Haploid as it has one gene.
But if an egg is fertilised with two genes but those genes are the same then a Diploid...
I use 10 frames in my 14*12 Nationals along with 2 Dummy boards. That way they have a bit of extra insulation at both ends and when I inspect I can start at the end with the sun behind me. Plus there is now no need to put that first frame on a hanger or on the floor.
I have a solid hoover pipe attached to the side of a bucket. The bucket has a lid where the flexible hose goes to the vacuum. That's surrounded by fine mesh.
As the bucket is small I can carry it so there is no ribbed hose or bends where the bees go.