Anything we suggest is not going to make your mother say yes. If I was you I would talk to her and get the reasons as to why she says no and go from there. I spent about a $1000 on my setup and cham not including feeders. The size enclosure I have is not suitable for an adult male, so I'll have...
Chams can't hear, but the do communicate through low frequency noises they make. They can feel the vibrations of low frequency sounds, so if you sing to your cham in a deep low tone it will feel those vibrations.
Ok, some things I noticed are that you are feeding meal worms. I would cut them out completely. They lack nutrition and with your chams urates being orange this could be an issue as the urates suggest some dehydration. Wax worms I would only feed as a treat mauve twice a week. They are high in...
I have an all glass enclosure and my cham hunts without issues. And if the door is being opened daily for cleanings and feedings the air circulates and does not become stagnant. Anyway, the op is having issues not me.
Reptiles learn to tolerate things and people, but that doesn't mean that they trust you or anything like that. Just keep misting and occasionally try to hand feed a treat. But be patient and most of all be respectful to your cham as they are solitary creatures and don't like be handled.