can we Use vrealize log insight instead of Splunk for small Jobs?

1. methods to get data into the Vrealize log insight?
2. restricted on pulling data from?
3. restrict on data permission in Vrealize log insight.

1. Syslog and the Log Ingestion API
2. No restrictions. If you can send it through either option from #1, then Log Insight can receive it.
3. Yes, through the use of datasets.

All of this information is easily available through the Log Insight documentation page, mainly the administration guide: https://docs.vmware.com/en/vRealize-Log-Insight/index.html