The Mughal army in the 18th century was characterized by several factors, including its size, discipline, and the financial structure that supported its soldiers and officers.

Size of the Mughal army:
- The Mughal army was known for its large size. It consisted of a vast number of soldiers, including both cavalry and infantry. The Mughal Empire was one of the largest empires in Indian history, and its army was reflective of its territorial expanse.

Discipline in the Mughal army:
- The Mughal army had a reputation for being well-disciplined. The soldiers were trained in various military tactics and strategies, which enabled them to effectively engage in battles. The Mughal rulers, such as Akbar and Aurangzeb, implemented strict military regulations and maintained a hierarchical structure to ensure discipline within the army.

Financial structure of the Mughal army:
- The soldiers and officers of the Mughal army were paid on a monthly basis. They received a regular salary, which was an important incentive to ensure their loyalty and commitment to the empire. The payment system helped in maintaining the army's stability and encouraging soldiers to remain in service.

Soldiers often on the verge of mutiny:
- Despite the well-disciplined nature of the Mughal army, there were instances where soldiers were on the verge of mutiny. This can be attributed to various factors such as inadequate pay, lack of proper provisions, and the decline of the Mughal Empire itself. As the empire weakened and faced political instability, the soldiers' loyalty and morale began to waver, leading to instances of mutiny.

Conclusion:
In conclusion, while the Mughal army in the 18th century was well-disciplined and had a large size, it also faced challenges such as soldiers often being on the verge of mutiny. The financial structure, including the monthly payment system, played a significant role in maintaining the stability and loyalty of the soldiers and officers. However, the decline of the Mughal Empire and various other factors contributed to the weakening of the army's morale and discipline.