Online Quote Request and Management System

I need to know of a system than could do the following. Any suggestions.
It is for a quotation request system.


- The website user will select services they require (1 or more).
- The user will then create an account
- They will upload a document(s), related to service(s) they require.
- Each completion of a set of service requests by a client will be
bundled into a job.
- A client can have multiple service requests related to that job and
multiple documents related to a service request.
- Example: a client requests a Bill of Quantities and A Schedule of
Rates. They can then upload one or more documents related to each of
these. This is then bundled into a job, and given a job number.
-Each client can potentially have multiple jobs.
- They would re-use the account they created to purchase new sets of services.

- Upon receipt of the job request an administrator would view the
documents from the backend system.
- They would then give the job a price, and a link would be sent back
to the client to allow them to purchase the job (if they wish).
- Once purchased the status of the job would be updated to a
paid/pending completion status.
- Then an administrator would complete the job and update the status
of the job to complete.
- The administrator uploads the related completed files for that job.
- These files would then get emailed back to the client.
- Everything would need to be stored an online administration system,
so that if the client came back at a later date requesting a copy of
the completed job files again (if they lost them).

- An administrator would have to be the ability to search for a job by
status, client name, date etc. or a combination of these.