While I discourage excessive cheating, The Sims 4 is a sandbox where cheats are officially supported via the console. Here are the most useful.
Type testingcheats true (Enter) to enable full cheats.
motherlode – +50,000 §kaching – +1,000 §rosebud – +1,000 § (legacy alias)money <amount> – Set exact household funds.bb.moveobjects on – Place objects anywhere (ignore grid/slots).bb.ignoregameplayunlocksentitlement – Unlock all career/reward items.bb.showhiddenobjects – Access debug/decor items (search "**DEBUG**").bb.enablefreebuild – Build on any lot (hospitals, police, etc.).sims.add_buff <buff_id> – Add specific moodlet (e.g., buff_Inspired_High).cas.fulleditmode – Full CAS edit (body, traits, voice) on any Sim.stats.set_skill_level <SkillName> <1-10> – e.g., stats.set_skill_level Major_Cooking 10.careers.promote <CareerName> / careers.demote.Type help in console for full list. Cheats disable achievements on console; PC achievements unaffected.