Hello,
as Austria is one of expensive country in europe, accommodation, food and attractions tickets are expensive, being backpacker traveler i have planed, as it is hard to skip Austria from bucket list, that is it smart way to visit Austria from Munich and bratislava as both cities are less expensive than slazburg and vienna and graz. as travel time is also less than hour from both cities. share idea if being accommodate in bratislava in slovenkia do day trip vianna and than graz, and do day trip from munich to salzburg it will cut the cost of expensive stays and food items in Austeria, and we can save handsome amount if do visit free walk tour hiking and free attractions and also do visit selected museums.
kind regards