I am pondering about if I should start saving for a fleetcarrier* or go on building my fleet...
Although, knowing myself, the only thing that can keep me from spending money for ships would be having them all... I guess.
From which I'm still quite a bit away, anyway. Still missing the Imperial Courier and the Vulture from the small category and quite a few of the mediums.
* Given I am able to take my credits with me when I finally manage to leave the museum...
Carrier feels better as a long term goal, i wouldn't limit myself from trying different ships. Well, Corvette, Cutter, Ananconda can easilly get 1b+, ok, that's significant, mb those can wait after all, but others, no, no way, saving money must have limits. Other thing is also that, as you can see, gold rushes happen, could use another one for a boost when you're aiming for a Carrier.
Got the carrier now and found the crew. Wakey wakey!
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I've put more than 4 billion in the budget, so shouldn't have to worry about that for a while.
My fleet is on the way over from the three different stations where they were and I'll bring over all my stored modules shortly.
When I bought the FC at Ehlanda, Clark Port, the system was already knee deep in other fleet carriers, so I guess there was no room for my carrier and it was sent to another system about 30 LY away, so I had to go there to board it. When I got there I checked one of my terminals, and enabled Refuel/Rearm/Repair but also want Vista and Cartographics. (Won't let me click on "Available Services." )
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Also want to stock up on tritium but looks like I can't do any of that here, so if I go to a system where all that is available but can't dock anywhere as all full up, as was the case where I bought it, what can I do then? (I think there's sufficient tritium already to get me to one of those places by default, isn't there?)
All that said, I still haven't started figuring out how to launch the thing yet, and the crew doesn't seem all that interested so far...

Common, carrier producing systems (i. e. ones with carrier building facility you can see near one of the stations) are full, and they can place the newly built carrier to a nearby Sys. Don't mix them with Carrier admin Sys - those are available in numbers, no prob to dock there usually, and you can change your carrier modules while docked there. Livery also only there i think, so make sure it's all set before leaving, tho anyway nothing stops you from returning to change smth later. Filter on Gal Map.
You have 500 tons of Triitium initially in your tank, it's enough to cross 2k ly at the very least. Find a Carrier admin Sys nearby and jump there to buy whatever services you wish. Then look for a reasonable (50k) priced Tritium nearby, jump again, or fly there with a hauler, and load 1-2k tons for some Bubble operations, or whatever quantity you wish if you aim for smth else. And then you're all set.
Consider cargo Tritium is just cargo, Carrier only burns the fuel from 1k tons fuel tank. I. e. you loaded your 2k tons backup in your Carrier's cargo racks, but when tank gets empty, you load it to your ship again and then
donate to your carrier via refueling menu. Kind of not too obvious, but most of ppl quickly agreed that it's a minor thing and not worth changing.
Thanks guys, launching it seems easy anyway as there's plenty of places I can do that from as you said
@aRJay.
My only concern really is finding a system with space to dock, so I can stock up with tritium and put Vista and Cartographics on board. I've found all the systems in Inara and EDDB shows the best prices for tritium but will those systems already be full of other fleet carriers with no room for mine? I guess I'll just have to try to go to them and find out but it will be tomorrow now.
EDIT: Just noticed - as I can launch the FC from the R/H panel in any of my ships, I guess I can do that even if the ship I'm launching it from is in another system can I? Or do I actually have to be on board the carrier myself?
Again, filter for Carrier admin, not vendor, those are different things. You can schedule a jump from wherever given you have fuel in your Carrier's tank (or be back to transfer fuel if not). Tritium-wise, again, a lot, no probs. I'm usually sticking more to the Eastern side of the Bubble, but as an example, Turnat. 1 Carrier there currently, according to Inara. Lorenz Ring sells 5k Tritium supply for 50 182. All fine - and in fact your goal, especially if you load much, is to come to an empty Sys to park at an ideal spot, a couple of Ls of the station, and then you hardly care if you pay 53k in place of 50k per ton too, as it saves time at the cost of another milllion.