why am I asked this because I have assembled and still doing my Titan XD. But than question came to mind what to do next like in year when it's built. Well you might saw my truck online, I'm looking to add couple more things, but I don't when should I stop, as than no turn around, and if I ever need to sell it what do I do? It's now almost no turn around point. I wonder what other do with their trucks ? Sell as is, trade it for van, as I would not be able to trade in this truck at dealership anymore. Well, you will say why do I want to sell, well it's more hypothetical question, if I will need it.
This is the kind the thing you need to think about it before you buy the stuff. How long do you keep it, do you set-up for a 3 year trip around the world or just average joe of 24 days off/year + some week ends...
Everything I have is removable and suitable to go in another vehicle. What ever you built in that stays on for ever you will not get any return when sold. What works for you does mean it will work for your buyer.
I changed from an LC Prado to a Hilux. I was able to transfer most of the expensive stuff except the roof bars. So the auxiliary battery system, including all the cables went in the Hilux, so did the fridge slide and the fridge, and also the RTT.
I do my best that most of what I fit can be removable easy and fit another vehicle if need it.
I think the most overpriced items are drawer systems. They are bulky, heavy and they can fit only one vehicle. Unless you go on the road for years... for me they don't make much sense. I have a box system, not pretty as a drawer but they work for me. I got one box with all the kitchen stuff that stays on top , and another one with tools and spares. I can get the box outside and open it in 1 min . The table I use stays in a very nice spot, takes no room, takes 1 min to remove and set. Should I spend 2000 euro on a drawer system I will use 30 days per year maybe, and maybe I save 5 min day , add 80 kg, but looks cool ? No thanks..
As far as cost... up there is no limit. Since I do have limits, I prefer to spend my money on trips than gear..