Best price/output ratio - commercial projects?

Don't rule out the DIY option, it is by far the best bang for your buck.

Keep in mind we all started as newbies and built our own rig with the help and support of the very active members here.

There is a commercial section if you want to have a squiz through that and compare for yourself: http://www.xsimulator.net/community/forums/commercial-simulators-and-prototypes.52/

The DIY path always seems a bit daunting at first, but have a look at existing member builds, that may inspire and help you refine your own project as it easier if you follow in the footsteps of others: http://www.xsimulator.net/community/forums/diy-motion-simulator-projects.22/

You will find plenty to get you started in the FAQs, from design software, dimension of sims, to PSUs, pots, motors, JRKs, Arduinos and Motor Monsters and more: http://www.xsimulator.net/community/faq/

We have a glossary for all those acronyms we tend to use, which will help you decipher some descriptions: http://www.xsimulator.net/community/faq/glossary-of-acronyms-and-names.66/

Feel free to ask questions, the members here give freely of both their time and expertise.

A lot of racing motion rigs have the screens separate, as moving them would have a significant impact on motion speed and performance.

The motion of such rigs is very fast, at up to 300-700 mm/sec over relatively short axis movements, which is even faster than many commercial rigs. They are designed to reflect motion down to ripple strips and the road surface itself.