Options:

F1 - Inf.Money
F2 - Keep Raining
F3 - Residential Buildings Low Consumption Of Resources
F4 - Industrial Buildings Low Consumption Of Resources
F5 - Commercial Buildings Low Consumption Of Resources

Notice:

First start game world and buy something "Spend some money ", Then activate the cheat then spend more money once more, It may take 10 second to activate cheat.
First build a residential area and wait for building to go up then activate residential buildings low consumption cheat.
First build a Industrial area and wait for building to go up then activate Industrial buildings low consumption cheat.
First build a commercial area and wait for building to go up then activate commercial buildings low consumption cheat.

• Cities: Skylines - Trainer +1 Money [1.9.0] {iNvIcTUs oRCuS / HoG} [2017-Dec-02]
• Cities: Skylines - Trainer +5 v1.12.1-f2 {MrAntiFun} [2019-Jun-12]