Bill, we all started in the same place with detailing. This isn't a contest to see who can sound the oldest or most experienced.
The truth is that most people who post on this forum tailor their responses to the experience and skill level of the person asking the question. The reason is, as with any acquired skill, there are certain basics and prerequisites for mastery. I remember a thread some time ago where you said you had been detailing for five years, yet last month you started a thread asking what to tape off when you're polishing that made it sound like you've never done it before.
Listen to some of the responses you've gotten in this thread--you have one professional detailer saying that it would take him and his partner 3.5 hours to do this vehicle, or 5 hours by himself, including one step of polishing, and shampooing the carpet and floor mats, then compare that to you and your friend a month ago:
http://www.autogeekonline.net/forum/auto-detailing-101/101719-question-time-spent.html , where all you did was basically a wash, clay and wax with an interior vacuum in the same 3.5 hours. Yet you are prepared to adopt the pricing of the experienced pro detailer.
Although you don't realize it, I am trying to help you. I'm not really sure why you want to detail this vehicle. I'm not sure if you think it would be fun, or if you want to get some more experience detailing, or if you want to impress your friend, or if you want the money. But the one thing I am sure of is if you are more forthcoming you will get advice that will be much more valuable to you than price targets from professional detailers who detail hundreds of vehicles a year. You're not going to be able to get the same results that they are, nor in the same amount of time.
Since this seems to be a recurring theme of you not knowing how long a job will take, and therefore not knowing what to charge or what you will be able to get done, perhaps you should offer your friend's parents an hourly rate, perhaps 12 or 15 dollars an hour. I'm sure there are a lot of minimum wage workers that would love to make that under the table. Or maybe drop the pretenses, tell them that you would love the challenge and opportunity of polishing up their truck, it would be good experience for you, and if they will provide lunch and iced tea, that will be enough.
Perhaps then you'll actually get to polish something, and will have some idea what it takes and how long, which will help you on your next project, or maybe on this couple's other car that you could actually charge them for. And most of us grew up with parents, friends, neighbors, etc. there's no need to refer to them in some sort of code like we're on a secret project. That's the great thing about a forum like this, you can come here and bare your soul, and you're fairly anonymous, your friends can still consider you the detail king.
And just to reiterate, we all started in the same place, which is nowhere, knowing nothing. Some of us learned by swirling up our parent's car with a scotch-brite pad, I think most of us really learned about detailing cars when we got our own, then we expanded out to parents, relatives, friends, neighbors, where we worked for free or lunch or a small amount of money. There's no shame in that. I personally am kind of horrified when people are running a detailing "business" and they haven't even mastered the detailing of their own vehicle.
Bill, you're young, this is the time to learn, college is the time to mature from a teenager who thinks he knows everything to an adult who realizes how much about the world he doesn't know. A good friend of mine once told me the more he learned, the more he realized he didn't know. And people with an open mind keep learning. And I think that's about all the life advice I have for today, perhaps some of it will get in.
Oh, and PS...I just sat here for maybe an hour, trying to help you, I hope you can see that...but I'm pretty sure you will make me feel like I wasted my time.