You're in a tough spot: most of the consulting recruiting is directly from the full-time programs; they do hire "industry hires" as they call it (i.e. people directly from industry who are highly experienced in a particular area - which is a possibility for you). But if you want to do consulting, then you really should go for a full-time program, but as you know, given your traditional profile (engineer/IT) and age together -- you're going to be a big stretch for those top schools. Schools such as Ross, Darden, Duke are more in your range.
The other thing to consider is that 80-90% of the people who go into mgmt consulting leave within 2 years. There's a reason why consulting firms hire an army of MBAs, because they have to replace the bucketloads that leave or get let go.
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