Not knowing how much your lathe and mill weigh it's hard to say. If you don't exceed the weight capacity of your trailer and it's rubber and floor is in good shape then yeah move it yourself. You're going to handle that stuff with more care than movers would. Not knowing the abilities of the movers to handle stuff like that I couldn't say whether they would do a good job. If you can rent, buy or make a rola-lift it will move the safe easy.