The pressure is there to get gil donations to buy the house in the first place because the FC doesn't have any good ways to get gil without one. The existing marketable items that can be purchased with company credits aren't worth all that much gil because other FCs are likewise selling those items for gil. .
Once a FC has their house, there's no need for the gil donations. They've got gardening plus workshop to make whatever gil they need. Member donations of topsoil (buy with tomestones in Idyllshire if someone can't mine it) and some of the materials need to get the initial airship and subs built is about the limit to the need. Once those are established, a FC should be self-sufficient without member donations by selling what the garden and workshop produce. Having to pay 2 million a month is a drop in the bucket compared to what our FC makes from the workshop, which has the same gil potential regardless of whether a FC has a small or large house.
If a FC has a house and feels strapped for gil, the officers are mismanaging the FC's most valuable asset. All those shell FCs that some players set up to get access to multiple houses? Most of them aren't doing it because they want more houses to decorate. They're doing it because FC houses are gil-making machines.
