I’d be glad to help and assist you on how to achieve this in your QuickBooks Online (QBO) account.
You can add your equipment as Inventory. Product or items that you sell and need to track the quantity for falls to the Inventory item type. To add them, ensure you enable the Inventory feature. Once done, you can follow these steps on how to add your equipment:
Go to the Gear icon.
Select Product and Services.
Click New and select Inventory
Add the Name of the item, SKU, and Category.
Enter the quantity of the item.
Fill in the needed information (no need to enter income and expense account as you didn't buy the item from your vendor).
You’re always welcome to get back to me if you have other follow-up questions in managing your inventory. I’d be more than happy to work with you again. Have a wonderful day ahead and more success in your business!