Planning a world tour within your budget is not so easy. There are many expenses involved in a trip like hotel accommodation, transportation, food and drink, etc. Many hidden expenses can also come up all of a sudden for which you have to be prepared and keep some extra amount for emergency.
With a proactive approach and little know-how about travelling certain places, it is possible to make some advance strategies. Then it would be convenient for you to get the best world tour within your pocket. Here are some aspects that you can keep in mind to get an affordable trip:

Book in Advance: Make sure to book major expenses on airline/train/bus, hotel accommodation and others before starting your trip. This would give you financial freedom to utilize your hard-earned money accordingly.
Search Online: Internet is a good source to find out many services simply by sitting in front of your computer. With the help of internet you can find several useful things such as areas, best time to visit, affordable vacation rentals or hotels, etc. Low-priced services can give you enough choices to enjoy a memorable vacation.
Explore Main Destinations: By exploring several destinations you have more choices to learn about those places, people, cultures, traditions, religious beliefs, etc. Even you can find out the best areas to stay comfortably within your estimated budget.
Get A Package: If you want a hassle-free tour, you can plan for a world tour package. Such types of packages have everything one needs for a relaxing vacation. Moreover, the monetary aspect is also upfront so you have more choices to get the exact things you are looking for.
While seeking affordable world tours remember not to forget about real pleasure of travelling. Given enough time to look for interesting aspects around the world and make a list of the desired destinations where you desperately want to visit.