I’m not saying thats wrong, I was doing similar for 19 years, however a few months ago I saw a video from @Bubble_Guy, where he was mixing solution up and bottling up, I had read others for ages using methods whether they being straight soap on the washer of a mixed solution on to he window or the washer.
After changing up my set up I mix a 5 liter bottle I fill the empty bottle with water then add 1/2 oz of gg4 and 1/2oz of soap to the 5 liters of water mix it and its ready to pour into my holster bottle, this solution mixed lasts about 5 days (Well thats how long till it runs out).
When I do screen cleaning I add about 1 oz of soap to a down stream bottle which then 2 liters of water is added and it is down streamed to the screens.
I appreciate your method, I am just suggesting an alternative method that might save in costs at the end of the day, as 1/2 cup of each solution for each job would add up quite quickly I would imagine.
I used a bucket for 19 years, it was only 3 months ago or less I went bucket less and I wished I had done it years ago, I did a few homes that I do every year and I saved about 20-40 mins just from not having a bucket to move around it was just boom, boom , boom.