If I were to decide to purchase it by tomorrow, how soon can you deliver the software assuming your designer will do the design and I will be handling the integration?

It depends on how quickly you come to a certain UI design final view which actually is an undetermined process since creating designs may have unlimited iterations (there is always room for improvement.) However, we do not anticipate it more than 1 month after that day. Anyway, we can deliver you the product with our standard design scheme so you can start integration in 2-3 days after the purchase is made, and later replace the UI with a newly designed one.