I understand where you coming from but at least you have a 100+ odd goal in mind, yet you understand the possibility of losing while chasing this dream, some gamblers will go all in on this same almost impossible dream, using everything they can get their hands on, since you keep risking only what you can afford to lose I believe there is a possibility that it will come true.
It's a dream that might not come true soon... betting on odds over 100 means you have less than a 1% chance of winning. But if you keep placing parlays, one day you'll hit that goal. And don't worry too much about losing; usually, when chasing parlay wins, you're only betting a small amount. If you can afford to lose $1 to $5 a day, you're all set.
Some people are good in sport games predictions, although they do not winning all their games but they get 70 or 80% chance of winning some of their games and they get very lucky to win few. However, there are gambles that have won more than 1000 odds from some of the games they predict or given to them. Gamble is entirely based on luck, so a gambler can not know the right games that he will win and the ones he will lose.