The best way to make sure you can get everything you need and know where to find it is to play through the full Season 4 story before you begin. A large part of the skyscaleโs cost is in unique resources obtained from events and resource nodes in specific Living World Season 4 explorable zones.
41g raw gold. 1500VM + 250 kralkatite ore (1000VM) + 250 other 5 maps (1250*20 = 25000VM) = 27500 VM, ~128g if eaten and bought trophy shipments. 30g grow lamp (even if you craft yourself it's opportunity cost, you could've sold for that much to other players) 12 skyscale food @ 3g each, 36g. Total = 235g.
If farming actively, which is obviously faster you should definitely follow taco routes and farm LS4 nodes and join a few LS4 metas. If farming passively, set up all your alt-characters on bjora essence chests and in about 2 weeks time you have full LS4 currency stacks without even entering a LS4 map.
FspPd.