1.) Is it too difficult to study and work full-time?
2.) Am already planning on taking a Powerscore course, but was wondering if it would be worth the money to hire a tutor on top of the course? I have saved the money needed, and in the past tutors have really seemed to help me personally (SAT, etc).
First, your thoughts are in exactly the right place. You're thinking about how much you can do to prepare for the LSAT, rather than how little. (This is not to be disparaging to anyone, as this certainly applies to me as well. Human nature being what it is, "what needs to be done" often devolves to a code for doing the least possible. The LSAT should be done eagerly, with a hearty insistence upon The Max rather than Good Enough.)
This makes the specific advice almost superfluous. That written, if I'm reading your post correctly you will have some three months in preparation for the bar. The answer is that this is possible, of course, but with a full-time job you will truly need to focus much of your after-hours time toward the LSAT.
(It's possible, of course, to being practice exams now, giving an additional three months' time. This will not "take away" from the effectiveness of the course, but will instead enhance it. So, again if I'm reading your post correctly, the time to start preparing is now.)
An interesting thing about the LSAT books. It's natural to think that we'll prepare by having done a question that will re-appear, which of course would give us the advantage. Score! While possible, it's unlikely--and less likely that we would remember the question, plus the right answer. More to the point, it's beside the point. The key for LSAT study is in going over, repeatedly, the logical patterns tested. After all, there are only so many basic patterns that can be devised before we start seeing them repeated. It's not the question but the pattern that's important. THAT'S what will be helpful when the real LSAT comes.
So, taking a dozen exams is likely to have a significant impact. Much of this is simply in the motivation and mental exercise to do well. The next dozen, a more modest impact . . . but almost certain still a positive one. The next dozen, and the dozen after that? Still postive, even if only a point or two. But we cherish each of those extra points, with reach schools especially.
To all: As to a course, that's almost certainly a requirement. I was too poor to afford one, way back when, but if you can at all swing it (again this is written for others), assume that this is a "cost of doing biz." Expensive, true. But even an extra half-dozen points will make a big difference.
As to a tutor, I'd be inclined toward the opposite. Unless you have someone with significant credentials, and unless you've exhausted every practice LSAT there is . . . unlikely, of course . . . the added value of a tutor is probably marginal. Still, I hesitate to recommend against it, so if you are so inclined, give that person a try. But remember that the key is not some "inside secret," but rather the mental exercise that comes with practice test after practice test.
Best of luck . . .