As he thought about finding a way to help Elder Song reach the Domain Lord Realm in the future, it didn't take long before he thought about different special spiritual herbs that could help enhancing the strength of the soul. After all, the most important aspect of progressing through the Nascent Soul Realm was strengthening the Nascent Soul itself.
Establishing a pseudo domain before taking on the final challenge of establishing a full-fledged domain was only something one would have to deal with at the Peak of the Nascent Soul Realm and wasn't really something that Elder Song had to worry about at the moment. Especially considering that the sect had the Dao Enlightenment Monument to help out with that when the time came.
