After visa stamping

I am an engineer and had got job in saudi and visa processing is under progress. My consultant had told now that university verification is done and the same would be sent for saudi culture for attestation.
It is closed now till ramadan and we will send it just after ramadan and it would take 10 days so i would be getting my visa in hand by August 1st Week. My last day in present office is 25th  August (Dint Expect the process to be completed so soon (in 45 days) So gave that date)
I have personal problems and want to travel late by September end.
How much time does the companies generally wait. Will they be after us, Can i delay for so long. Can i delay for 50 days
Pl answer and help i am in dilema and worried

Pl anyone who delayed the travel pl reply ..
will the company guys accept such requests
how long will the visa be valid if stamped

I received my passport with the initial visa issued, I'm required to be in KSA within 90 days of issue (that's when it expires). I'm sure your visa will be similar. You need to speak with the company planning to employ you, they are the only ones who can say yes or no to delaying your timescale for arrival in KSA within the visa time limits.