Airtable: permitting non-collaberators (clients)to view and update their own records

I can see I can use softr/airtable to allow clients to login and view the data we hold about them. Is it also possible to allow them to update fields? Bank account, email, address etc in our case.

We cannot afford to give clients Airtable seats.

Yes it is!

Check available features under each pricing option on the Softr website.