Can I add both a CRM app and an Inventory app to QBO Plus?

Hello,

I am new to QBO and need to figure out a more robust system for my business.  We do around a 100 BOM's, Assemblies and kits and I'm trying to figure out if one of the Online Quickbooks has a workaround to record this.  It doesn't  have to be fancy.  We also deal with Business's that have several contacts that we deal with on one transaction.  We sell Ice Paint, build application and maintenance equipment, and provide services and rentals to Hockey Arena's, Sportplexes, Sports fields, Communities and cities all over the world.  When we deal with an Arena we have to deal with a Purchaser, Ice Maker, Supervisor/Manager during the sales process. Then for invoicing we deal with their accounting department.  We also have dealers around the world with different pricing for our items of inventory.  I just need to keep track of this.  I'm looking at adding some apps in to help but I don't know if they can all sync together and the separate company's I'm dealing with these apps only know that their product can integrate with QBO Plus, but don't know if having another app will be able to sync the information I need.  I'm very open to figuring out workarounds in QBO and am willing to move to the advanced if need be.  I know that Desktop Enterprise has all the capabilities, but the cost is a lot.  If I can find a way to use QBO online with just one integration of either CRM or Inventory apps with some workarounds or have QBO able to do it all I would be very open to it.  I just can't seem to get straight answers out of anyone at Quickbooks.  They seem to have people they send me to that can't answer my questions and are specific to one type of program that QB has, and I've spent over 3 weeks now trying to get these answers.  If someone out there in this community could possibly share with me the answers I'm looking for, I would greatly appreciate it!  Thank you.