If you are interested in joining our network please consider to become an ERP-consultant for SQL Ledger yourself.
There are various ways of generating some extra income:
The General Public Licence under which SQL Ledger is licenced does not only grant you the right to share the software - it is also possible to sell the product.
Some other ERP-vendors charge a partnership or reseller fee which needs to be paid annually. With us there are no such fees. We are a non-profit organization in the spirit of free software and you only need to pay if you would like to have voting rights at the annual conference where the future of SQL Ledger is being discussed.
As far as your service portfolio is concerned you might want to offer hosting, training, adaptation of LaTeX templates, migration support, importing legacy data, administration of the SQL Ledger servers etc.