B
Black Swan
Bit harsh!
Perhaps but... here's my thoughts, at £375 quid and 20 'players' you'd never be able to make it work. Why? you'd need to be able to rent space at circa £10-12psf (in central London?) to make a decent profit, otherwise you're just lining the pockets of a landlord with no profit.
At circa £25 psf you may break even and simply provide a service for like minded guys to gather together and trade, if that's Spin's philosophy then count me in, but that seems on the face of it a lot of work for others' benefits with no guaranteed return and probably strapping yourself into a lease with personal guarantees together with all the set up costs...