Be cautious OP.
There are lots of "volunteering" opportunities, many are simply money making schemes for the organisers.
Young Western kids going to teach English in India/Volunteer at clinics in Africa/work at an elephant orphanage in Africa.
Not to say the volunteering is a scam, but it's no more than a profit centre for the organisers.
I have two young adult children so have done quite a bit of research on this.
My son went Wwoofing- wwoofinternational.org/
during a gap year- a great experoence working on organic farms - it's a global organisation, the cost of his time abroad was low- £30 to register, pay for flights.
In exchange for 4-5 hours work a day "wwoofers" get free accommodation and all food, so no real living costs.
He did a range of work at different farms, helping with sheep shearing, picking fruit, cooking, repairing fences etc.
It was a really cheap way to experience working abroad.
There is no need to spend £6000- and I would be very wary at any organisation charging this for "volunteering" work.
My son's friend is off to India to "volunteer"- teaching English in some rural schools.
The monthly fees for this volunteering experience is £600 a month, which includes accommodation and food.
"Volunteers" are housed in very basic accommodation, large shared dormitories, basic food, rice, lentils, vegetables.
Given the relative cost of such things in rural India then I question where that £600 is going.
My guess is most of it is feathering some pockets.