That’s a big move, and Cork specifically is one of the tighter housing markets in Ireland right now, so it’s good you’re thinking about that upfront.
I am pro to take the leap, but here are a couple of practical things I’d look at before deciding:
1. Rent vs net income (not just salary)
€90k sounds solid, but what matters is what you actually take home after Irish taxes + social contributions. Ireland can be pretty high on that side.
Then compare that to current rents in Cork (Daft.ie is usually the best reference). You’ll get a much clearer picture of what your monthly flexibility looks like.

2. One income vs two (this is bigger than it looks)
Going from two incomes to one isn’t just about the total number, it’s about risk and flexibility.
Things like:
what happens if the job doesn’t work out
how long it would take to find another role
whether your wife could realistically work later on

3. Housing reality check before committing
If possible, try to:
line up temporary housing first
or at least confirm how long it typically takes to secure a rental
Some people underestimate how competitive it can be and end up in short-term setups longer than expected.

4. U.S. side considerations (often overlooked)
Even if the move makes sense financially in Ireland, there are still U.S. reporting/tax considerations in the background once you’re abroad.
Not necessarily a dealbreaker and it can be something that can actually help you, but it’s something I’d at least be aware of before making the jump so there are no surprises later.

Not saying it’s a bad move at all; it could be a great opportunity, but I’d probably run those numbers and scenarios first so you’re not relying just on the headline salary.
If you do move forward and want to think through how everything connects (especially the U.S. side + living abroad transition), I’ve helped people map that out step by step. But either way, you’re asking the right questions 👍