joomla community builder or jomsocial expert for user docume

request: - user can write description to file - file can be upload and user will retrieve credit - file can be either shown to community or specific people only - only registered users can download files - users will receive credits for upload - user will have credits substracted for document downloads implementation can be based on either jomsocial or joomla community builder Please show the portfolio you have done before using jomsocial or joomla community. Bid without portfolios won't be considered. Payment will be made via GAF escrow only, we pay by milestones.