If your uncle can make so much money and still end up back at zero, he needs a complete lifestyle change and, if possible, proper rehabilitation. At this point in his life, he is married, and his first priority when he earns a lot of money from contracts is to invest in his family and have a steady flow of income that will support him even when contracts are not available at the time.

First and foremost, he needs to reduce and, if possible, stop his lavish lifestyle; drinking and partying without control will only make his life miserable; he could have used that money for the family, getting some drinks and chilling at home or taking the family out on a picnic or something; it would have made him spend less than what he spends on partying, drinking, and womanising.

It would be better for him and his family if he could put an end to all of this and invest the money in something worthwhile. This is the only problem he has that when stopped, he will live a better life than what he does now.