Half finish upgrades

I think that it would be a cool idea if there was an option to finish half or a quarter of your upgrade instead of your whole thing for less gems. Let's say I have to stop playing in 20 minutes. I have an upgrade that is 30 minutes, and I want to finish it and upgrade something else before I have to stop playing, but i only have half the amount of gems it takes to finish the 30 minute upgrade. Instead i use my gems to finish half of the upgrade and i wait 15 minutes to upgrade the next thing. Then i still have five minutes to upgrade the other item before I have to go. What happens without this is I cant upgrade the second item until can get back on, which is dependent on what you were doing. If you had to go to school after those 20 minutes, then you would have to wait 8 hours to upgrade your next item, and instead of waiting 30 minutes for the upgrade to finish you technically have to wait 8 hours. Overall this might save a lot of time and money, if your in a similar situation.

Or you could wait 15 minutes then gem it.

The idea is too make you spend more, for that reason SC will not add this idea, sorry.

It is a good idea however, keep them coming.

Wait the 15 minutes and then gem it. Problem solved.