Yes can do surgery at higher center with due risk and ventilator consent.

If surgery is a must, then plan at a place with post operative icu / hdu support . Discuss with the anaesthetist if regional anaesthesia is an option.

The patient needs to be assessed clinically and his/her Pulmonary function test and other investigations need to be done. Medical science is not a mathematics where 2+2=4 is the rule.

Only if fit. Segmental anaesthesia is better

It's not about the age but about your fitness which matters. Severe sleep apnea can coexist with other comorbidities which should be controlled. The surgeon and anaesthetist will be explaining you about the risks involved while evaluating you and during consent taking. It may fall under high risk procedure. Risk vs benefit to be considered. If its more beneficial then you should go ahead. Discuss with your surgeon properly.

Yes of course The patient needs to be prepared for a few days before surgery