Thanks to technology, we live in an era where you can work with clients all over the globe. So don't feel like you only need to work locally. For example, I have about a dozen regular clients in Europe and they are some of my best clients.
With the ability to record from your home studio setup, you can do all your billing and transfer of files online. For billing, most invoicing software has built-in multi-currency accounting so that you can take care of business in any currency.
As far as sending your recording files to