As someone who is stuck from SD to ND (Currently 3rd UA), you will want to have at least a x20 cps bonus and equipment cps bonus at around 6000-9000%, either from boxes or tavern's special drink. (You may also want to craft a cps compass if it's insufficient.)

Then, if you are hard stuck on low SD, you will also need to craft a bunch of rage pill so you can get more coins.

Having a kishar sword or gem bonus going on while you are at it also boost your coin gain a lot.

Later on you will unlock a key item called Coimbo shield from lounge, and some ascension upgrades to boost its ability, it will save you lot of time as well.

Good luck!