Sure,Entry Clearance Officers are bound to be well-aware of the difficulties involved in making any FIRM arrangements ... which is why I've always felt that *this was a rather daft
prerequisite. Nevertheless, I can assure you that it DOES exist. I mean what OTHER means of proof can an ECO possibly expect? ... apart from the sponsor being in a position to wholly bear the cost of supporting the applicant financially [and in terms of providing suitable accommodation] for the duration of the visa, up until the time when FLR is granted and the applicant [by then the married partner] is allowed to take up employment.
So ... no,I don't think I've given INCORRECT information here. And I continue to STAND BY my belief that the Fiance(e) Visa is an unnecessary waste of money ... UNLESS the circumstances are such, that they are dictated by the sponsor's work commitments. But even then, if he/she has planned his holiday arrangements well in advance [with the objective of marriage abroad in mind] it need not prove an insurmountable obstacle. Indeed, I know of someone on this forum who is shortly travelling to the Philippines fo a mere 8 days in order to visit his mahal. Such is the "pull" of the Power of Love!