Your key question is "how do the commercial beekeepers do it?". If you look at the educational courses and qualifications (I think it was on the bee-farmers site but I am not sure) you will see that woodwork is part of the course. If you want to do it commercially and build a LOT of hives then there is inevitably going to be an up-front investment in woodworking kit and material to work on. If you are a beginner at woodwork you will need to plan to waste a fair amount unless you are lucky enough to have a woodworking tutor. I got some good kit off EBay (and some crap). I would suggest that you are going to need the following:
Bench saw, Cross-cut chop saw, Band Saw, Drill, Electric plane, Belt sander, Orbital sander, Router and Router table with appropriate bits. In addition you will need minor bits and pieces (digital vernier and depth guage, digital protractor plus some hand tools). You will need some dust extraction. You will not believe how much mess you can make building a bee-hive! Don't forget consumables - nails, screws, abrasives, yacht varnish/paint, wood-filler, danish oil etc.
It is quite a list but when you are kitted up and you have got the design and skill - you can knock them out on a semi-mass production basis. The cost per hive drops like a brick. I ruthlessly threw out all the old rubbish that had gathered in my garage for years and converted it into a workshop.