Anssi has an excellent point.
Despite what has already been said, you could indeed make the logs components. I would start by using the same log component copied up the entire wall. Then, for those that need to get modified in the same way, such as for the door, I would select those logs and make them unique. Then those logs could easily be cut with a couple of cutting planes or a cutting box. Editing one of them would result in the others getting cut, too. This process would be easier than cutting holes in a bunch of groups and would avoid the issue of scaled textures if you apply textures to the logs.