Dear Mark,
Real Estate manager comes with Paypal, it supports not all values, if you want use paypal - you need add only that values, which paypal supports,
www.paypal.com/multicurrency - PayPal's Multiple Currencies features
Available for paypal currencies: AUD, CAD, CZK, DKK, EUR, HKD, HUF, JPY, NOK, NZD, PLN, SGD, SEK, CHF, USD ,RUB.
To put GBP you need make changes in code. (We can give details how to do this)
To change the Price Format: you can in settings - RealEstateManager : Settings - Administrator Settings - Price Options - Price Format.
Thanks,
Taras
OrdaSoft team.