Salesforce Opportunity VS Custom Object

Constraint : 

Opportunity object is been used by many other projects in same production server

& Requirement is to upload the data into that object 

& Not required any standard Opportunity functionality like stages,forecast,relation ships to Products/Price Books / Quotes

	Opportunity	Custom Object
More control	No	Yes, Since it’s new there will not be any dependency on Existing Settings Code Workflows Process Builder Triggers Current functionalities
Data Import Wizard	No	Yes, Since we have requirement of data upload OOB can be leveraged. We can avoid code maintenance of custom built going forward
Rename Tab	Yes, But same object is used by other teams not allowed to rename	Yes
Field Tracking History	Yes, The limit is 20 and other teams already used that,So not possible.	Yes
Readily available stages	Yes	No
Probability Calculations	Yes	No
Indirect Lookup relationship Allowed as parent object	Yes	Yes
External Lookup relationship Allowed as child object	Yes	Yes
Account  Direct Relationship	Yes	No
Contact Direct Relationship	No	No
Forecast OpportunityContRole  Campaigning Opportunity splits Special relationship with Account and contact / Products / Pricebook / Quotes	Yes	No
Note : Salesforce Unlimited license supports : 400 Custom Objects