Think it through mate.
At the minute City turnover £400m (for arguments sake)
42,000 season tickets at £650 is £27,300,000'
If the prices are halved the club brings in £13,650,000 in SC revenue but the turnover reduces to £386,350,000
However the wage bill drops from £200,000,000 down to £50,000,000
The upshot is that City's profits rise to £160,000,000m which goes to the Sheik and all of City's players leave the UK and HMRC is £67,500,000 worse off in income tax revenue in year one.
In subsequent years all the good players leave the UK, the TV companies end up paying a quarter of what they paid before, your Sky subscription drops by £10 per month and football in the PL is shite.
That is why it is a ridiculous idea.