@Ian147
Only if you book for more than 28 days, then it will be possible to pay into two parts or more. It is an Airbnb procedure, and the host do not have control on this. For exemple, if the guest books for 40 days period, he/she can pay first for the 28 days in advance and later on for the rest of the stay. If it is a 70 days booking, the payment can be in 3 installments, being 28 days + 28 days + 10 days.
If the guests book for less than 28 days period, they pay at once.
Anyway, depending on the country, it is possible to pay in stallments via cred card for less than 28 days. Anyway, the host is paid in full 24 hours after checkout. In Brazil, guests can pay in 3 stallments via cred card (without paying interest), but the host has no control on this. We can just advise the guest about this possibility, but we can not set this as an option. It appears automatically for the guest.
You can check if in your country there is this possibility via cred card by phoning Airbnb.