Salop Hackspace doesn't exist as a hackspace, and all of
the makerspace type activities can be found via the
Shropshire LUG  mailing list.
However, Potteries Hackspace  in Newcastle-under-Lyme
and Fizzpop  in Birmingham are also close to you and
your son, and worth contacting and / or visiting.
Answers to most of your practical questions can be found
in the FAQs and the mailing list archives of the UK Hackerspace
group . Speaking from experience  in the long process of
helping getting the Potteries group going, building a
core group of people is often necessary before getting
any sort of premisis, but getting a space is crucial to then
building viable membership numbers - it's a paradox
most groups have faced unless very lucky with support
Hope that helps,
 https://nwhackspace.wordpress.com/ passim