If a company chooses not to have engineering support either directly or sub contracted that is a commercial risk, it should not become a flight safety risk, so you land and have a flat tyre, what you going to do? Of course common sense says you wouldn't take off again, but remember the MEL is there for the protection of you and your passengers, you may find your self with multiple MEL items each on their own pose no risk, but together they may increase the risk.
A Captain may ignore any SOP or minima if in his/her opinion the safety of the aircraft is at greater risk by adhering to said SOP or minima, but he/she had better by right, I have never seen in any company manual or instruction anything to the effect that " as Captain I may ignore any operating instruction or procedure if it is more commercial to do so or prevents a flight delay"
