Just bought a 3 level condo going against all advice to live on one level as you get older.

 I totally disagree, you stop doing steps, you stop being able to do them, thus vastly limiting your options for travel, dining out and recreation. As one of my moms' therapists told me, once you get an ejector recliner, pretty soon you won't be able to stand up from the kitchen table.
Kitchen and dining room are on the entry level, downstairs bedroom with full bathroom down seven steps, up seven steps to living room and walkout deck, up 7 steps to main bedroom and full bath. Staire have good railings on both sides.  Since I'll be carrying cups of coffee up and down it will force better stair climbing.