A Sahaabi mentioned to Rasulullah (Sallallahu alayhi wasallam) that he intends to go to Bahrain for trade. Our Nabi (Sallallahu alayhi wasallam) instructed him to first perform Salaat, then embark on the worldly act.
From this Hadith as well as many other narrations and Qur’aanic verses it is abundantly clear that the Mu’min should commence all his worldly activities and attend to his worldly and physical needs first with Salaat and Dua. Ibaadat is of primary importance. It has priority over all our worldly affairs.
The same applies to medical treatment. First resort to Salaatul Haajat and Dua, then pay attention to the lawful means which Allah Ta’ala has created for the worldly matter. The worldly means and agencies are secondary. However, the norm now is to resort to dua when one has failed in the worldly activity.
An act which is commenced without Ibaadat becomes contaminated with shaitaaniyat. With the Name and Obedience of Allah, come barkat and success. And, even if there is failure in the worldly enterprise, the true Mu’min will understand that it is the decree of Allah Ta’ala and in it is goodness for him in this dunya and the Aakhirah. This is Tawakkul. Allah Ta’ala says in the Qur’aan Majeed:

“Perhaps you dislike something while (in reality) it is good for you.”

Give Sadqah in the beginning. Don’t procrastinate for the time of failure and loss.