*As of November 7th this deck is worth about 50$ (I try to go below) on TCGPlayer without tax or shipping. Prices also may vary.
I actually had some spare money from making the main deck and extra and every main or Extra Deck upgrade is a bit too expensive than what the budget allowed so I build a little small and cute Side Deck for this. The Baldrakes are for the mirror, book of eclipse for Purrely, and Heartbeat is for Labrynth or maybe Rescue-ACE. Anyways this deck actually has the potential to be about as strong as it's full power version. You're just missing some consistency, and Extra and Side Deck ultility. For potential upgrades I'd consider investing in more Tearlaments Kashtira first. It's a bit expensive but it really is a great card for this deck. It's great to open, it's great to mill, and it allows you to play through more. Past that I'd probably recommend focusing on the Extra or Side Deck after that. Guardian Chimera and Baronne (with Diviner) are great cards, but too pricy for a budget list like this. Tearlament is actually a very customizable deck so feel free to cut or add whatever you like to the Deck.