I prefer a prehung stand. It normally takes me about an hour to set one up. Tree stands are good to go as soon as you are done hanging them. I have had elk and bears come in while I was still working away.
Dreaming big, I hear ya. I have been in your shoes so to speak, but now I can say, I would go to my stand if I had only one hour left to hunt. Tree stand hunting is not a last resort, but where I go to kill elk. I go there because it increases my opportunity at taking down a critter. I do not know why you are not succeeding from a stand. There are many possibilities and probably the least likely culprit is old Fickle Luck. Like the devil, Old F.L. gets a lot of blame that that he does not deserve. Look over your placement and stand set up, then consider what you are doing in the stand. I sat my son in law in my best stand some years ago. After about 5 days of absolutely no action, I was concerned. I always have some opportunity there in that amount of time. Just out of the blue so to speak, I asked him if he was calling from his stand. He said he was regularly bugling. Though I have called in different elk from my stand, I have learned that is usually a mistake. I told him he should stay as silent as possible. He did and his luck changed right away. That is just a guess. Maybe you too would get some good from the Tree Stand Hunting Rocky Mountain Book. I tried to cover everything a hunter would need to know to be successful, with some explanation of why. Never trust Fickle Luck for your hunting success. He is just not trust worthy. Maybe like the devil, he will give you a taste of success, only to head you down the wrong path.