I was considering the same, but wasn't sure if getting the double wing now might be an advantage while trying to enroll in tec courses.I would do exactly like @rongoodman said and ditch the double wing for right now. In the same token, I would keep my eyes peeled for a used doubles wing. I got a $300 45lb Apeks doubles wing for $100, because I kept my eyes peeled. I also have a really hard time paying retail for pretty much anything, other than my CCR. Basically, buy when it is convenient for you and when the right deal comes along.
And for the drysuit part, haven't dove in one yet. I'm assuming that it will be come unavoidable once the dives start getting more serious into tec.