Moved in to my own apartment 6 months ago (that I'd been renting out as an IP for the last 15 years) and spent $50,000 doing it up for myself to live in only to find that it has only increased in value by the amount I'd spent on it. Great lifestyle decision but poor investment/value adding move.
That is a lot of money.
We rebuilt a whole house (Nathan style) including re-sheeting the walls, new kitchen with granite bench tops, paint, floorboards, large deck and french windows for around $17k. Admittedly it was around 5-6 years ago now and we did the work ourselves. My mind boggles at what you could possibly do to an apartment that would cost $50k.