Appartment investing and prepayment %

Good afternoon,

my wife and I (mid-thirties) are looking to invest in real estate (first time).
We are very excited but haven't started yet (will start before summer).
I have around 140k invested in equities (with 10% in bonds)
I also have around 20k on the side in my everyday account, for security.

My wife has also around 150k, but not in equities, in saved money (bank).

I had a talk with a personal advisor and he suggested me not to pay more than 25% in advance, but rather take a long loan as bank interest rates are becoming interesting again and my investment fond grows faster.

However, my wive's fond is not growing and she wanted to put as more prepayment (like 35-40%)

So, for an appartment of 400k in brussels (where we both live and work), my advisor suggested we both put around 50k prepayment (100k total) while she would put around 90-100k both (180-200k total).

What would be your advice or view on the matter?
Take care!!