I can give you the option of Clearpay (subject to an account), there is a 6% invoice surcharge for using this service.
For Wall Art - Depending on your order amount, you can spread the cost over 3 monthly installments (or shorter if you require). With a % as a deposit to be paid upfront.  Once your final payment is received, your wall art will be ordered.

Your images will be ready to download within 72 hours
Prints and all other products - up to 28 days
Mini Sessions - within 48 hours