Ditto. It will be easier initially, but you will not learn how to weld thinner stuff. Also concur that you probably don't want to buy a 110V cheapo flux core machine at home after you use what you have at work.
I work at a desk also, but do everything of my own at home. You will inherently do your job better because you will gain a deeper understanding of what goes on the drawings you specify. You learn what can be done in theory, what can be done in reality, and specifically the capabilities at your company. If you want to be a successful design guy then it's a good idea to have a rapport with the guys in the shop. I worked for a huge company once and when I had a question on how to set something up on my mill at home, I asked the machinists at work. They thought it was cool as heck that an engineer was asking them questions and were more than happy to help. I knew every one of them by name. The same for the welder, when I tried to weld aluminum for the first time, I'd ask him questions. I sincerely appreciated it. I asked because I needed to know, not to brown nose. However, the side benefit was that it seemed like any time I had a legit work project, my stuff always got done before everybody else's. Not trying to ramble here, just saying that it will help you in many ways. Go for it!