The requirement is about the amount invested and its lawful source, not about a single transfer. Staged contributions are workable when each tranche is separately evidenced and the total meets the applicable figure at the relevant point. Ask counsel how the chosen structure and offering documents treat instalments before relying on a phased plan.
Fix the funding sequence in writing
Set out each expected tranche with a date, an amount in both currencies, the asset it comes from and the evidence that will accompany it. Then ask counsel which sequence supports the intended filing date and whether waiting for a later tranche is preferable to filing on incomplete funding. A subscription agreement may also impose its own payment schedule, and the two timetables need to be reconciled before signing rather than afterwards.
Two further points shape how a staged plan should be built. First, the offering's own subscription agreement may impose a payment schedule of its own, and a plan reconciling personal liquidity with the immigration requirement still has to reconcile with that document, which is easier before signing than afterwards. Second, capital must remain genuinely at risk once invested, so a structure that allows a later tranche to be withdrawn or refunded if a sale disappoints is not the flexibility it appears to be.
Put both questions to counsel with the draft documents rather than describing the intended arrangement in general terms.