Welcome back! Based on that that scenario you should be fine at either location. I would recommend Wilmington, but I may be a bit biased...
As you know building the credit is step one, as long as you have no bad debt in your past then building to the credit score that you need will easily happen in 1/2 that time, your goal will be to get 2 of 3 credit scores above a 640 but if you get close there are options.
The other step that you will need to focus on is your debt to income ratio. If you have just the car (hopefully not a Ferrari car payment) and you control your spending habits with the credit card then you just need to make sure that you have the right income ratios to offset the debt.
Keep in mind that a major job change as you move could be problematic. Most lenders want 2 years of job history from the same employer or industry so please weigh that into your decision. It sounds like you will have both 2011 and 2012 tax returns at that point to use, correct?
I just helped some buyers purchase a house with a similar scenario of time back in the US, they have been happily in their new Wilmington home for about 2 months now. Feel free to let me know if you have any questions and I can connect with you the right lenders & programs. Then the easy part is finding the right home...Best of luck no matter where you end up!
Century 21 Sweyer & Associates
910-297-7071 (call or text)