But on topic, Helena has 200 septims. 50 of which will be spent on a carriage back to the Imperial City from Anvil, then a further 25 will be spend on carriage from there to Chorrol.
I've not yet been able to convince Helena to walk somewhere yet. She's far too scared, especially after what happened at the Brina Cross Inn.
What exactly do you mean by carriage? Do you have some sort of Silt Strideresque mod?