Doesn't look like you should combine them at all. You can work with such groups of records quite effectively without combining the data into a single record though I would add a field to identify the type of record (owner, bank, seller, buyer, etc...)
You can perform a find, sort records, use a relationship based on Location or a portal filter to pull up records grouped by this Location value.
Oh Okay thanks! The thing i really want to do is to look for the owners according to their banks, is that possible to do it with the relationship?
What I think that you need is a "parent record" that is related to this group of records. I don't know if you are managing property, buying/selling property, or something else and that can change what one record in this parent table represents. Let's say that you manage property for these people.
A table of Properties with an internally generated PropertyID field set up as a primary key could link to your current able and to a location table. All of the records in your example would link to the same such parent record and could be listed in a portal on that Property table based layout. If you entered find mode and specified the name of a bank in that portal, you could find all properties linked to that bank and the owners would appear in the portal for each such record. It's then possible with a script to use Go TO Related records with the Match Found set option if you want to pull up just a list of the owners for all these properties on a combined list.