It's a medium term band-aid. Anyone with half a brain can figure that out. As clubs like Parramatta, Wests, Canterbury, Souths and Easts consistently average 20k over a season in modern venues, Manly will have to move with the times or risk becoming a dead relic. That move will either involve a centralised venue or the Sunshine Coast.
Long term, unless a 35k seat stadium is built on the Northern Beaches, we are moving. Long term, the infrastructure to the Northern Beaches will improve, which will allow for the club to eventually move to a more central location. Give it an election or two and the entire region will fall to independents at both State and Federal Level, which will mean severe pork barrelling from a Coalition desperate to get it back and a Labor party convinced they can steal a Liberal heartland.
This is a realistic assessment of the situation. $20m is enough for a decade or two but we are absolutely farked in the long run.