Replying to Trying to make my box move easier...suggestions anyone?

alright...idiot question, but how do u guys move ur heavy boxes/rails around?

I have like...three options that i could do to where to put wheels. either make them so they can fold inside the box, put them on the side and flip the box whenever i need to move it, or build small triangles with wheels on the bottom (not touching the ground whenever i don't lift it up)  at the ends so that i can lift one end, and wheel it around....idk which one would be better...

So what do u guys do?