Had a few fitness pieces at home after my accident while I wasn't able to go to the gym. I've added more since then and could use input on what my next few gym investments should be. I am intending to retire in the next few years so won't buy a power rack or full cable machine for example until I move to my retirement city.

Currently I have

Dumbbells 5lb-40lbs
Easy curl bar, clamps, weights
Resistance bands (5 strengths)
Lots of space with exercise mats (puzzle piece style)

An adjustable bench seems like the next reasonable investment and then dumbbells up to 60 or 70 lbs perhaps. what would I want after that?

Does it make sense to buy in between weights for dumbbells to do drop sets or more variation (example = 8 lbs, 12 lbs, 17.5 lbs etc