One thing that I'm having trouble with is how much my trip will cost/how long will I be away until I run out of money.
Stupid question I know and if somebody asked me the same about any of the small tours I've done round Europe I'd say how long is a piece of string, but after a few mins of thought I would be able to answer,12 days, central Spain, 3K mls, no camping, mid range hotels, pissed most nights £60 per day (everything I spent whilst away but not what I had to spend before I left)
So, there must be somebody who can come up with a £ per day for my forthcoming trip

UK to southern India and back via Greece,Turkey,Iran,Pakistan. Camping and v cheap hotels/hostels.(approx 8 month trip because of climate)
I understand that there are so many variables that this is a BIG ask but anything like "Greece 3 weeks, Turkey month, Iran 3 weeks, Pakistan month, India 3 months, 2 months to get home, camping/hotel £xyz"
This place must be a flood with people with this knowledge floating around in their head, so watta got.
p.s. " I do here by promise to get you a

or 6 when we bump into each on the road for such an informative answer"
Pete