Your biggest costs are accommodations and travel from place to place. The less you move the less expensive it is per day and the better rate you can get at a hostel.
You haven't answered the question regarding your skills and what kind of work you are doing now. That would help with suggestions of what you might do while traveling.
You haven't answered the question about your ages either. If you are under 30 you should seriously look at the WHV schemes as they permit you to work legally and hence make decent money in some cases.
You can use groups like couchsurfing and hospitality club but be aware that folks will sometimes expect you to take them to dinner or otherwise show some appreciation for the free accommodations.
Try contacting Servas if you want to help people and get free accommodations.
Be careful of overstaying visas or visafree periods. Be aware particularly on Schengen in Europe and the rules that you can spend no more than 90 days in a 180 day period within the Schengen zone.
Ruth
