Doing paradharma (business of lower varna) during financial distress is allowed for Hindus. Though it is paradharma it is regarded as Aapathdharma during emergencies. Doing paradharma in absence of emergencies will pave d way for hell.
"Apya karma shatam kruthva Barththavya manu abraveeth"
Do even 100 mean works to protect ur family - Manu Smriti