A fire tore through a car park near Gatwick Airport, West Sussex, on Saturday, destroying more than 100 cars.
The ‘significant and complex’ blaze erupted at Caldyne Business Park in Rowfant, near Crawley, at around 8.55pm.
No one was injured in the fire, which roared well into the early hours.
The car park is often used by holidaymakers and those staying at nearby holiday parks.
Megan Maynard said on Facebook that her brother’s car was gutted by the inferno.
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The business he had spent years building, K&L Automotive, was destroyed ‘in just one night’.
Ashley Riley, who started a GoFundMe to raise money for the family, said: ‘They have lost their livelihoods and the amount of money to replace everything is unmeasurable.
‘They all have families to support and will now struggle to get life back on track and to rebuild their business from scratch.’
More than 2,000 homes nearby suffered blackouts when electricity had to be shut off after flames damaged high voltage equipment.
Power has since been restored and no outages are being reported by UK Power Networks.
The cause of the fire is unclear, but fire services say it involved a workshop, electric and heavy goods vehicles and cylinders.
A man, 67, has been arrested on suspicion of arson. He has been bailed.
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