since (he was) young

[Tan Elaine]

His family was wealthy and his parentsshad bought him whatever he wanted since young.

Should the part in bold be '... since he was young.'?

Thanks in advance.

[Harry Smith]

His family was wealthy and his parentsshad bought him whatever he wanted since young.

Should the part in bold be '... since he was young.'?

Thanks in advance.

Yes, you can also say "since his youth" Young is an adjective. You need to write a noun after since.