Which version should I have for translating part-time?

 G'day.

 

I am currently using SDL Trados Studio 2017 Professional version in my company to translate.

Although I'm an initiate with Trados, I feel that Trados is pretty sweet as a translation tool.

So, I'm considering to buy one for my home as well to work for part-time translation, and was looking few versions out in the store.

 

Prof. ver. cost like 10x of the Freelance, so I don't think I will need the Professional version. 

 

Does somebody know the crucial difference between the two? Provide some hints please.

Thanks.