Nah, I think i might have made a mistake in the first post anyway. I've updated it so there's no Comfortable -> Industrial option. I might have not realized it at the time. 

Anyways, it's been addressed. 

[quote]

x To upgrade a Comfortable district to Rich = 5 Wealth, 7 Personnel

[/quote]

It also might still be affordable, [@The Savant] :>