It definitely needs to be examined when asking for info about traveling specifics?
It also helps to educate yourself about cost of living. If you want budget how are you wanting to do it? Join a group budget tour? Sleep in hostels with shared room? Eat two meals a day rather than three?
If you use a guide you Must include a tip. Your price is dependent on a tip. Ask tip percentage and don't let them say as you like. Ask what is the highest tip you got and the lowest? Ask if you tip on travel time or on price?