I say single handed but in all honesty a small help from one member, either way I could have done it in under 30 days.

After buying a small cottage in Gridania I wanted a medium house in Limsa.

The only way I could have a second house was to form an FC.

All crafts (bar fishing) and DOL at 50, 4 retainers who mine crystals and shards

spiritbonded over 30 full sets of Patrician gear crafting 2500+ madman whispering rods.

(about 2 hours work a day) selling all the Materia

Exchanged seals for Coke and Peacock ore and crafted HQ Darksteel ingots and HQ Rose Gold ingots

Around 20m Gil earnt.

Here's the bad news, Spiritbonding is capped, the other day converting my gear produced mind and piety, about as much use as a chocolate teapot.