And one more thought on the facilities - why do they need a maximum number of days (e.g., can only do up to 15 days at a time. etc.,)? Since each facility produces at a specific rate, it really doesn't make any sense to constrict how much product we can have "in-process" at any given time because only so much is produced at a time. Sometimes, I need to walk away from FT for a couple of days (like to go visit the grandkids) & it would be nice to be able to "front-load" my facilities such that my absence doesn't impact what my facilities are doing...
When facilities came out they didn't have a limit and people where loading them up with tons of stuff. The developers had to put a limit in to keep people from making tons and tons of money everyday. This was when we only had a hand full of facilities I bet now if there was no limit people would be making a billion coins a day or more. When you post help in the facilities people will produce 20% of what is loaded so if you have 15 or 100 days worth of product in the facility when someone comes to help they produce 20% of what is loaded and it didn't take very long for people to get 100 days worth of stuff produced. For that reason the developers put in a limit which still allows people to make money but not a billion coins a day. Now as for leaving your facilities running when out of town just don't post for help or do post for help and if you are like me people will only get about 66% of the stuff finished and that leaves the rest running and should be done when you get home. Also I know we are all addicted to this game but if your farm is not producing or growing anything for a few days it is not the end of the world.