Some food for thought from Wikipedia:
The consensus among biblical scholars today is that there was never any exodus of the proportions described in the Bible. [ 15 ] According to Exodus 12:37–38, the Israelites numbered "about six hundred thousand men on foot, besides women and children," plus many non-Israelites and livestock. [ 16 ] Numbers 1:46 gives a more precise total of 603,550 men aged 20 and up. [ 17 ] The 600,000, plus wives, children, the elderly, and the "mixed multitude" of non-Israelites would have numbered some 2 million people, [ 18 ] compared with an entire Egyptian population in 1250 BCE of around 3 to 3.5 million. [ 19 ] Marching ten abreast, and without accounting for livestock, they would have formed a line 150 miles long. [ 20 ] No evidence has been found that indicates Egypt ever suffered such a demographic and economic catastrophe or that the Sinai desert ever hosted (or could have hosted) these millions of people and their herds. [ 21 ]