Would you spend more than 100k on house renovation?

I wont, unless its freehold (non HDB/ condo). but of course if you are earning alot and you feel you want to live comfortably/ according to what you want, then i think its ok. it's just like how some people travel, some people buy things...

Too expensive

No, Too expensive and I might move again.

I recently completed my house reno without going through an ID and spent about $40k for a 120 sqm HDB flat. It was a tough job doing self coordination works but certainly saves a significant sum of money. I personally places emphasis on practicality and functionality when it comes to home reno instead of aesthetics. So I would say no to splurging more than $100k on it.