TML,
Sounds like a good idea. Nice to see you showing consideration for your two brothers.
I think you seem to have a good plan in place. No one knows, or should I say, no one wants to face up to the fact that we aren't through the hard times when it comes to the economy. The best place you can be is at uni studying something, making friends and all that lovely stuff.
I think your plan is realistic, it has a play it safe feel to it which I like. At the moment there aren't that many opportunities for modular guys but who knows what the market will be like when you've finished uni, modular might be a bit more desirable then. If not, go integrated.