I would think that's a bit much, especially for the long haul unless you really like doing water changes.
29 gallon tank , after adding sand ,live rock , 25 gallons of water , maybe less.
10 fish, all about 2 inches size.... no I don't think they'll fit. Lose the chromis and keep it to the remaining 4 or add a chalk bass or a dwarf dwarf angel (3 inches total max size) or a 6 line wrasse.