As long as the court is happy to accept jurisdiction there is no reason for finances not to be dealt with by the courts in England. If one or both of the parties is habitually resident in England or Wales jurisdiction would not be a problem.
It is a good idea to familiarise yourself with the court process if it looks like you are heading that way. Where possible agreements out of court are encouraged. You may want to get some advice on a likely outcome. You can do this without engaging a solicitor for the whole process. Have a look at the low cost fixed price services offered through this site or give the helpline a call to discuss.