Fresh out of college, I was "the only employee" for a year or so. Yes, I had to wear many hats (answer phones, fix computers, get coffee, prepare letters, etc.) in addition to drafting and the occasional calculation or visit to a client. The boss told me that not all guys fresh out of school could handle all that, and told me stories of various people he had employed over the last 5 years before me who had to go, because they couldn't. I'm sure he mentioned this to keep me motivated!
AgMechEngr,
If you aren't sure who you should hire first, find out. Try keeping a clock on your various activities (accounting, admin, drafting, etc.) and see what you spend the most time on. Supposedly you should already know this, in order to do your billing accurately, but I understand that not all business people do it. I also understand your qualms about training someone, but you should let your need lead the decision to hire someone. The amount of training needed will actually depend more on the person you hire. Find the right admin or draftsperson and they will teach YOU things. So don't base your choice on that. Base it on where you will gain the most free time, then optimize that decision by finding the best person you can afford.