Land owners responsibilities when subletting

Hi everyone would like some feedback please ?
Friends son has purchased 20 acres in country SA in his own name which is not his PPR.
1. He rents out shed on the property to a farmer to store tractors.
2. He leases a paddock to another farmer for livestock.
Question : I would assume he would need some sort of lease in place for both farmers and also public liability ins ?
If some livestock stray onto a public road and cause damage to a vehicle or worse is he liable ?
If the shed catches fire and destroys the tractors is he liable ?
I'm a bit worried that he seems to think nothing can happen, and has nothing in writing !

 

Both tenants should have public liability insurance and he should have cover on his own property as well both building and public liability.

 

A written lease should be done as their agreement would be unenforceable otherwise.

 

@Terry_w Would you mind explaining further please ? What would be unenforceable ?

 

The lease.

 

Thanks Terry I'm pretty sure he doesnt have one !!

 

They might have an oral agreement.

 

They're quite pleasurable but may be hard to enforce.