Pony
Glad to hear that no-one was (seriously) injured. A 2-day stay in a hospital is nothing to sneeze at. The rest is just stuff and can be replaced.
As to your request for ideas, you don't give much to go on:
1. What do you do in the garage? Wood work? Car work? Speed boat repair? just storage?
2. Assuming you work on cars, what kind of work? Basic tune-ups/oil changes? Frame off restorations? Body and paint work?
3. You're looking for ideas on 3-4 bay garages, but how many cars?
4. Are you an accomplished mechanist/mechanic (with your own lathe, lift, blast cabinet, compressor, drill press, etc) or a weekend warrior with a tool box holding only hand tools)?
5. Will the garage be only for cars or will you need to cough up space for washer/dryer, second refrigerator, stand up freezer, lawn care equipment, lawn furniture, etc?
And finally, take a look at the Garage Gallery. You can spend literally hours on the details provided on everything from a 16x24 one-car garage to 100’x60’ machine shop-in-a-backyard. You will find great ideas on cabinet design and positioning, floor covering, arrangement of equipments, mobile vs static tool chests, decoration, garage doors, and lighting. There is hardly a facet of garage building/design/usage that hasn’t been touched on