Don't mean to sound negative on this, just think it's worth some analysis.

I think it's strange that big cities would have a market on this. I understand big cities mean a large population base to support the most "niche" of products and services. However, for organizational services at least, I would think big cities, with the perks of living there being central/close to amenities both utilitarian and luxury would make one's life more likely to be organized, and therefore big cities would have less of a need of organizational services.

If there need is indeed there, I'd certainly look further into it, maybe draw up a business case to see if it is worth your time.