Salesforce Flow and Data Taxonomy

Job ID: 33707368

Budget: £20 – £250 GBP

I require a Salesforce flow expert to solve the following use case:

Millions of property records are imported into a custom object using Data Loader. The same property can have many records, each relating to the last transaction. (e.g. House name, Location, County, Post code, Price paid etc.) -This raw data is uploaded monthly.

I then need to process this raw data before deleting it.

Processes to undertake:

1) Create unique Property records in a custom object
2) Create unique Transaction records in a custom object and link to the Property record
3) Create unique Post code records in a custom object and link to the Property record
4) Create unique Location records in a custom object and link to the Property record.

A postcode can have many properties.
A location can have many properties.
A Property can have many Transactions

The objects, relationships and fields have been created but I am unable to create a flow for my use case. Each attempt results in multiple records being created.