[Highland Park] Recommendations: small business voice and data solutions

Hi all---A not for profit I am affiliated with needs to expand its voice and data services for its office. They are looking to make it as wireless as possible--and will need a professional phone system (put calls on hold and buzz someone's office before transferring the call, voice mailbox for each employee, fax line, wireless data plan for the office, etc.) They also need a central storage place for their electronic files---a cloud with remote access for example. They have priced out a couple packages through 2 local companies and the upfront costs are quite high ($10K+). They have not gone to At&t, Comcast, Verizon yet. Does anyone know of any companies that might be more competitive in their pricing? Thanks, Pam