Just can't see past new vs potential. If you spend $50k on reno works you will achieve a massive uplift in rent, instead he feels better if he pays his $50k extra in stamp duty, developer's margins and wasted time travelling greater distances to work and facilities.
You realise of course that it's cheaper to build than buy existing in terms f stamp duty as it's only calculated on the land value. It's a myth that it's more expensive to buy new compared with existing