I have been to many courses where a lot of time was spent on the bunkers, and there were some complaints. Not alot, but some. At my current course, we hand rake all bunkers (only 39 and not excessively large), but full rake only 2-3 times a week and "touch-up" on the days in between. And the only complaints we've gotten are from too much/too little sand, or exposed bunker fabric (again, too little sand). Also a few complaints about consistancy since some bunkers have had sand replaced within the last few years and others have much older, somwhat contaminated sand.
My point is this, you need to ask the right questions. Is your membership more concerned about playability or aesthetic? You may say both, but both can still be acheived with the method we use here (NOT full raking everyday). If aesthetics are the issue, is it from color of sand, sand levels, appearance of the edges, etc? If it's playability, is it because of sand levels, consistancy, soft/firm sand, or really from poor raking? And even if you do actually get down to the point where the major complaint is truely due to poor raking, it begs the question of who is to blame. Even if the bunkers are raked pristinely first thing in the morning, if the first guy that blasts out of it doesn't feel like raking it, then every golfer behind him has justification for complaint, but NOT because of maintenance, because of golfer etiquette instead.
Bunkers are hazards and there is really no reason huge amounts of time, labor and money should be spent on them, ESPECIALLY on raking. Work on playability and consistancy first and I think you would find that most golfers will rarely complain about poor raking (the job that ultimately takes the most time and therefore costs the most money).