If I were going to start up a small gym I would probably handpick a mix of different brands and get the best from each... buy them all used.
Bluto as usual paying close attention, as i've posted this over and over on the training board for years.
For a non-BB demo getting different new brands in order to get "better" machines means squat, and multiplies the costs involved since they're not bought in bulk. Also increases potential servicing and parts replacement issues as no one vendor may be able to cover them under a service cotract.
As far as buying dispirate brands used, then you've got less appeal to the casual user with worn equipment, and again questions on parts replacement and servicing issues with older machines.
As far as hammer or nautilus the latter seems to be more expensive, with no upside for the casual user. For Japan you'd really have to contact local distributors to see which brands are more popular and less expensive.