Both lathe and milling machine accessories can be expensive and can easily exceed the cost of the basic machines. Keep in mind that you do not have to purchase everything at once. Some items require a great deal of quality and precision such as a Jacobs ball bearing drill chuck. Other items like a clamping set will work the way they are supposed to regardless of their quality. You will find as you do more machine work that you will develop a feel for using tools and accessories. There is no hurry so wait until the stuff comes on sale before you buy it.