budget for travelling in east asia

so I originally thought I was going to be limited to travelling in Europe. turns out I'm going to be allowed to go to place were ill need innoculations.
if my budget was 3000-4000 sterling, how long could I expect that to stretch for in east asia including flights from the uk innoculations and basically going to as many places as possible. all my research has been about travel in Europe.
but if I really slum it, how long? x

oli

Where do you mean by 'East Asia'?

There is a lot of difference between (say) Indonesia and Japan.....