Travel / The best way to travel from Krakow To Budapest - early July? [4]

Hi everyone,

I will go from Krakow to Budapest on 5th of july and im not sure about the best way to do it.

How can i do it at night? Im from Brazil and it's kind of hard to search cheap tickets from here. Would it be a problem for me to buy the tickets on 2nd of July when i get to Krakow, should i buy it in Gdansk on 29th of June or i have to buy it as soon as possible?

Is there any other way rather than Euroline Bus or the train that stops in Katowice and Breclav?

I trying to leave Krakow as late as possible so i can enjoy sunday in the city as weel as save one night at the hostel arriving in Budapest early in the morning.

Tks all for the help,