One of the largest platforms to find volunteer work on a farm is WWOOF (World Wide Opportunities on Organic Farms). There are WWOOF hosts all across the world. Choose your country and register to find opportunities
If farming isn’t your thing, you can also find volunteer work at hostels in return for free accommodation. Visit Worldpackers to find and apply to opportunities all around the world.
There has never been a better time to travel and get paid by working remotely. The opportunities have exploded since many companies that would not typically offer remote positions listen to what their employees want post-covid.
A time-tested way to fund your travel is to teach English overseas. If you are fluent in English, get a TEFL certification to make it easier to land jobs.
If you work for a multinational corporation with branches in other cities, ask your company for a transfer or find opportunities for work-related travel. Usually, employers will cover the cost of flights and hotels for an official visit.