Renting to guarantor

[Jc Law]

Do most of you trust a guarantor when finding a tenant even when guarantor have income=80x rent. Prospective client is renting as a guarantor for mother in law to live nearby him, proposing to do a 2 year lease, mother in law who will be the occupy is retired so all credit check and income is based off daughter and son in law.  Not feeling comfortable but this is the only offer for now, please advise