Simply open the cheats panel (directions above) and type Motherlode then press enter for every $50,000 simoleons your sim needs. If you used MOO or debug objects, your job with likely be harder at testing time.
You will need to move a tester Sim into your lot and have them test/confirm that all objects that should be useable to Sims on the lot work properly, and that there are no routing issues for your Sim anywhere in the home. Live play testing is important you’re going to share your lot in the EA Community Gallery.