Need advice on farming

If you have the donuts, run the collider for 10 days. Sell all KEMs that you might have, except for the original one.
Build at least 25 KEMs each time. After they are built, collect the XP and sell them. Build at least 25 more KEM. Repeat every 4 hours.
The more KEMs you build the better, but it gets boring after a while. Building 25 brings the most bang for the buck, as their cost rise from $220 to $14,400.

Thank you! I have enough donuts so I'll try 10 days and maybe I'll buy more KEMs at a time because only 100 KEMs at day would give a poor reward I think and I'll end up with still a lot of money at the 10th day and too many donuts spent...

I'm in the same boat as you...try 50 KEM per 4 hours if you want more donuts. Keep an eye on your money though. Right now 28-29 KEM is most efficient for your multiplier (basing this that you have approx. 130 characters) though.

The ideal number of KEMs to farm is however many you can farm and still keep your cash constant (balanced with the amount you earn for collections of buildings and tasks). Keep in mind that you also have to account for the money you might spend for additional boxes, when you don't choose the one with three donuts right away....as your bonus percentage goes up and you get more rounds of bonus boxes for the same number of Kwik-E-Marts, that can actually be a significant cash suck.

So, figure out what amount of cash reserves you like to keep and then play around with the number of Kwik-E-Marts to find how many you can farm ( including the cost to buy additional bonut box tries) and keep your cash at that level.

Basically, unlike farming bloodmobiles or rat trap trucks, which is more of an occasional "event," Kwik-E-Mart farming is an ongoing endeavor.

@BowieBlackstar Does the 256.10% include any hidden multiplier from Springfield Heights buildings?

There is a detailed info on KEM farming in this thread, third post : https://forums.ea.com/en/the-simpsons-tapped-out/discussion/90074/tips-for-new-players/p1

"SandraShill;c-1619856" wrote:
The ideal number of KEMs to farm is however many you can farm and still keep your cash constant (balanced with the amount you earn for collections of buildings and tasks). Keep in mind that you also have to account for the money you might spend for additional boxes, when you don't choose the one with three donuts right away....as your bonus percentage goes up and you get more rounds of bonus boxes for the same number of Kwik-E-Marts, that can actually be a significant cash suck.

So, figure out what amount of cash reserves you like to keep and then play around with the number of Kwik-E-Marts to find how many you can farm ( including the cost to buy additional bonut box tries) and keep your cash at that level.

Basically, unlike farming bloodmobiles or rat trap trucks, which is more of an occasional "event," Kwik-E-Mart farming is an ongoing endeavor.

Hey nice tip @SandraShill

I farm 50 KEMs every four hours and am still

"SandraShill;c-1619856" wrote:
The ideal number of KEMs to farm is however many you can farm and still keep your cash constant (balanced with the amount you earn for collections of buildings and tasks). Keep in mind that you also have to account for the money you might spend for additional boxes, when you don't choose the one with three donuts right away....as your bonus percentage goes up and you get more rounds of bonus boxes for the same number of Kwik-E-Marts, that can actually be a significant cash suck.

So, figure out what amount of cash reserves you like to keep and then play around with the number of Kwik-E-Marts to find how many you can farm ( including the cost to buy additional bonut box tries) and keep your cash at that level.

Basically, unlike farming bloodmobiles or rat trap trucks, which is more of an occasional "event," Kwik-E-Mart farming is an ongoing endeavor.

I can't bring myself to up my KEM farm numbers to break even. I am farming 50 at a time and make about 1-2 million dollars a day above the farming depending on my luck with boxes. I have done more but it becomes too time consuming for me. 50 is my happy place. The additional money cushion also allows me to quickly spend on rat trap trucks if I need additional donuts.

Thank you for the suggestions.
@SandraShill I'm at level 222 and I receive 1 donut at every level up. Do the bonus boxes return at some point? :/
@sjsebayacc131 Nope, I don't think so. Question: Are all the buildings extensions needed (classic and modern mansions) to obtain the hidden multiplier?

You have to reach level 939 to get the bonus boxes. Hidden multiplier only requires the main building not the extensions.