I don't mean to skirt the question, but I need to know what exactly needs to be done to the golf course?
You may need to extend tees to keep up with technology. Distance appeals to younger members. Build a consensus! On the other hand, senior members tend to embrace restorations whereby original design elements are revived and your architectural heritage can be reclaimed. While updating the length of your course may not suit the elder statesmen of the club, ordinarily the idea of restoration and preservation will.
However, virtually all golfers, regardless of their age, prefer thriving turf. Because memberships are more concerned with good agronomics than with strategic shot making, it would be good politics to approach change of any kind (restoration/renovation) with the emphasis on the ability of growing healthy, green grass. It is difficult to establish a consensus by preaching the virtues of various architectural principals. They are often unaccepted justifications for change. Agronomic justifications, however, are generally accepted!!!
After the committee has approved the new hybrid bentgrass for the aging greens or the new, super bermudagrass for the moist, disease-ridden fairways, embark on an inexpensive in-house tree "management" program and as an "after-sight", have the committee approve the construction of extra teeing grounds. An architect and a shaper could add extended tees, while your operation is down updating the grasses, at little cost in the full scheme of things. If they will sign off on the grass issues, then likely they will later concede that other improvements need to be taken care of in the process.
Arbitrary, third party experts are often the most persuasive to memberships. Memberships tend to trust those who do not have a personal interest or agenda in club politics. Better yet, hire an educated consultant who does not have a financial stake in the renovations to massage the membership. For instance, an USGA turfgrass specialist or even a consulting editor then could recommend an informed golf course architect with successful like/kind experience.
The facts of the situation often dictate the methods by which you can finesse the landmine of club politics.