A lot of that is passive time though - it takes a year to train the skills, but if you've already bought the skill books that just means logging on every few days to rotate the skill you're training according to an optimized plan you pre-determine. Similarly it takes months for a Titan to build, but that means moving components between the factory and the CSAA and the storage every once in a while and re-fueling your tower-stations weekly or something. It's not someone working 40/hours a week to build a Titan.
The hard part of that is the infrastructure - you need to own a star system and put up a bunch of towers and fuel them and haul/build/mine the components and minerals to your (hopefully out-of-the-way) system, and you need to have firepower on call to defend your operation if you're attacked. And the character training to pilot the Titan needs implants that are expensive and mean he can't be risked in combat (so you need a second account). Most of that (owning star systems, on-call firepower, maintaining towers, hauling/mining minerals, having spare/secondary accounts) is stuff that large alliances have to do anyhow for their other strategic needs (equipping sub-capital players, paying bills, constructing jump bridge networks, etc.) so for them it's just a bit of extra load on the logistics team, and they usually have economies of scale (they have so much money and space they can have 3 Titans in the hopper at once).
The hard part of that is the infrastructure - you need to own a star system and put up a bunch of towers and fuel them and haul/build/mine the components and minerals to your (hopefully out-of-the-way) system, and you need to have firepower on call to defend your operation if you're attacked. And the character training to pilot the Titan needs implants that are expensive and mean he can't be risked in combat (so you need a second account). Most of that (owning star systems, on-call firepower, maintaining towers, hauling/mining minerals, having spare/secondary accounts) is stuff that large alliances have to do anyhow for their other strategic needs (equipping sub-capital players, paying bills, constructing jump bridge networks, etc.) so for them it's just a bit of extra load on the logistics team, and they usually have economies of scale (they have so much money and space they can have 3 Titans in the hopper at once).