Is it wise to go for few odd jobs instead of one 9-5 job?

Why not? There are many people who do a few odd jobs to make a decent amount of money. You can also do online jobs to make money. But keep in mind one point. You may not have a fixed monthly income. You have to be prepared for that.

Yes, you can find many such jobs during the holiday season. This is a great opportunity to earn something extra. You can't predict, might be you start liking such a job that you want to make as your full-time career. Give it a try!

You can try for seasonal jobs available in your areas. Online jobs are also good for people who don't like to do 9-5 jobs. You can consider volunteering jobs as well.