Is what the questioner is doing, regarding making up for 11 years of intermittent and irregular prayers within one year by sitting at home and performing 70 prayers daily, Islamically sound, or is he mistaken and should he seek employment?

The madhhab of the majority of scholars is that intentionally missed prayers must be made up. The making up of these prayers should be done in a way that does not harm one's body or livelihood. If you are in need of work, then seek employment and make up the prayers in a way that does not adversely affect your work or livelihood. If you are not in need of work, then continue making up the prayers. The Maliki jurists are of the view that making up two days' worth of prayers with each passing day is sufficient, and by doing so, one's obligation is cleared according to them.