Been doing some testing and finding it easier to hit 2:38 and 2:39 every time. I may be able to find a 1 second time save somewhere in here. Gotta test a few more things.
New findings there should be a way to get 2:37. The issue is by doing the upgrade it opens many more upgrades separating the $5,000 money increase and then the $0 money increase you receive after, so the time save is negated by scrolling. If the scrolling can be perfected or a way to make more text boxes appear on a touch screen, would have to find a way to play with vertical dimensions on a tablet, which I think I may be able to find a way to do, then a 2:37 is likely to be achievable. Gonna start looking at window setups to optimize the upgrade display.