CRM Solution for Scrap Industry

I'd love some input and assistance on this:

We are looking to add either a CRM or an ERP to our operation.

Currently, we are running a program called Scrap Dragon for buying, scales, and ticketing. The system is simple enough that we don't want to replace that for our yard operations but desperately need to add something else on top of it for inventory management, P&L reporting, marketing efforts, customer portals, fleet management, and customer account management.

We have not used anything in the past so everything we are doing is from the ground up.

Any suggestions or guidance would be greatly appreciated.

Cheers!