*Please move if this needs to go somewhere else on the forum*

With that being said, I am getting pretty upset with how hard it is to keep the temps, humidity, etc correct. Please, if you have advice give me it. Lol. At this point I am willing to try anything. Now I will tell you about my set up.

I have my boa in a 29 gal tank, I know . Tanks aren't meant for snakes, but right now it is all I can do. I have the tank flipped on its side, so the lid is facing you when you stand in front of it. Which has also helped give her some more room. When I first got this snake, I was just using paper towels as she was just a hatchling and when I had got her she came from a bad situation. As she got a little bigger, I wanted something that looked nicer, and that she couldn't crinkle and ass all up but that would also help with the humidity. So, I ended up getting eco-earth. Followed the directions, soaked the brick, etc. I tried three different bricks, every time I used it, there was mites. As soon as I took it away, and treated. No mites. Three different times. So I stopped using it. I went back to paper towels, but with the paper towels, not only do they look bad but I can't get the humidity past 40% no matter how much misting I do. Two days ago I found some bricks that the company sent me for free after I sent an email telling them about my experience, so I used one. This time.... Wait for it.... MOLD everywhere. All over the bedding only 24-36 hours after putting it in. So I took it all out, and now we are back with paper towels, and very inadequate humidity.
Can someone please give me some advice? I want to get her a nice enclosure, but I just can't afford it right now. She has also become rather pissy, and I am guessing it is because of the humidity etc not being where it needs to be. Thank you in advance.