I need:
-documents storage
-workflow management
-cheap solution (docuware alternative)
What type of docs you have?
>>56043117
Invoices
>>56043257
I guess you're not looking for cloud based and for enterprise (not personal buisness) , then go with Sage.
http://fossforce.com/2016/07/onlyoffice-foss-office-suite-cloud/
onlyoffice, you can edit docs just like if they were office 365 on the web