I think it´s not a good idea to buy a kit and build a machine by yourself. A friend of mine tried a milling machine kit a few years ago and had a lot of trouble. He bought it somewhere abroad and said even the manual was very hard to understand. Probably made by a cheap translator software.
And when he finished his machine after several weeks, he had many problems all the time. And of course no customer service in reach. Fact is, the machine was out of order most of the time.
So, I can´t see any reason why I should buy a machine kit. They might be adequate for some (very simple) hobby tasks only. Professional work cannot be done with selfmade machines. I would never ever buy such a kit.
Someone here with the same experience?