There is an offer of investments much needed as well as goods and fuel and the investments into state, all writ and accounted for — and the nail in the coffin is of course a decade of observations on the state of Ishgardian economy and the plummeting it entered in agrarian and self sustainment of the population after the Calamity. So Laude proposes their major investment to go into rehabilitating a land leased to them at atrociously low prices into a greenhouses filled one
to start feeding the people and when there was an understandably outraged reaction at that like and what lord would sell their lands like this he was like surprise pikachu, but does the land of Gaspard not stand denied to its rightful owner and so nicely in the south?
And they used both good reputation and the yoke of investments as well as very huge hammer of blackmail that A'leigh spent eight years gathering on those in power in Ishgard either directly or indirectly.
tl;dr: two cats stroll in with a plan to help mass produce food+offer
housing to relieve the pressure of city overcrowding, and stroll out
with land, a title, and the house of lords in an uproar