Hey everyone!

So, I'm sure I'm not the first person to do this, and I'm sure that everyone is about tired of teaching newbies how to do things properly, but I need some help.
I recently adopted a baby male ball python from a friend who couldn't keep him anymore (long story, don't get me started). He came with a 20G Long glass tank with a screen top, a water dish and one hide. Now, I immediately started doing research and I have probably read everything on the internet about how to care for BPs and how to set up their enclosures, but I have just about worried myself sick over the little guy, because I am honestly just guessing over here. Every website says something different, and every person has a different opinion about how these fellas need to be kept. So, I just decided to bite the bullet and start my own thread, and ask you guys what ya'll think about his current setup.



Alright, so here is his enclosure. I've read a lot of mixed reviews about using glass aquariums as BP enclosures, but I did the best with what I was given, and what I could afford to replace. I did go out and buy black foam core and covered all the sides except for the front, and I think he likes it much better than when he was all exposed) His substrate is Cyprus which seems to do well with keeping the humidity up, considering the screen top. His humidity usually stays around 55%, though today it dropped to 50% for some reason, so I decided to give the "wet towel" method a try. (seems to be working, it's already started rising a bit)

His cold end (the left side with the half tree trunk hide) temp. usually stays around 77-79 degrees. (when this pic was taken, it was 77.4) His hot end (the right side with the branchy piece of wood thingy) usually stays right at 90-93 degrees. (93.2 when this picture was taken) I have 3 digital probe thermometers, one probe is located underneath the cold side's hide, and two placed in the branchy piece of wood thing. I'm somewhat obsessive over the temps on his hot side because I had some trouble keeping the temps up when I first got him, so now that the temps are reaching the 90's I'm paranoid that I'm gonna fry him.
I realize that if I bought a thermostat, I wouldn't have to worry so much about the temps, but I truly don't have any more money I can spend on this fella (besides his food, obviously).

His lighting/heating took me some time to get right, as I mentioned. Right now, I have his 40w daytime heat lamp on (the light on the left), and a 60w ceramic heat emitter. I bought a 100w CHE with the wire cage lamp, but I really think that's way too hot, considering how short his tank is. (maybe I'm wrong, someone let me know?!?!) I have the heat lamp on a timer to shut off at 8pm, and come on at 8am. This, in turn, causes the temps to drop about 5 degrees every night. Is that bad for him? I was using the red nighttime lamp, but it just wasn't producing much heat, so I figured it was a waste of my time. His tank does have a UTH, but again, I don't have a thermostat and I can't afford to buy a decent one, so I just unplugged it because I read too many things about people's snakes getting burned.

I don't know guys, I think I'm doing okay, but I still can't shake the feeling that I'm doing something wrong. I've had him for about two weeks now, and he's eating great, and all that, I just worry about it.

Does anyone see anything that I should fix, or have any suggestions or really ANYTHING. I need to be sure the little fella is doing okay.
(btw, in the picture, you can't see him at all because he was hiding beneath his little tree thing. that's his favorite spot)

Anyways, thanks in advance for the help! Seriously, you won't hurt my feelings, tell me how it is.