Rack vs Glass Tank/Aquarium or else?

in Poland we have phrase "every stick has two ends" and it look like correct here.
From one hand Rack system give stability of temperature and humidity plus is easier to clean so it's mean better conditions for snake but from other hand it don't give him a lot of space to explore and "travel".
In PCV cage we can try make similar condition like in nature environment but... in natural environment they don't live on newspapers or some substratum we can buy in shop. So we have to compromise in my opinion which will be best for animal. I can't buy PCV cage now, like i told before (maybe in future it will be more popular in Poland and i will can go to shop and buy them to change all of my cages) so i must build a rack (or maybe any one have better solution?)- do you think "growing tube" is good solution?* And use SAMLA boxes (now i use one of them [smaller one] to wash my BP)?

*- if i remove barrier for night they can explore more space and it maybe can be call "compromise" for smaller rack system.