How to create a customer database?

Hi all i would like to create a customer database for my window cleaning company.

What i would need it to do is track/store customer details, address name etc also have a few clean frequency options e.g weekly, monthly, two monthly, yearly.

Also i need it to it to then show when a clean is due some how by knowing the last clean date or something.

I need to be able to mark jobs as done and customer paid or not
producing the relevant invoices and
Then need to to track expenses and income and debts owed by customers

is this even possible with excel and how hard would all this be?


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