What are my options for correcting a gap in my front teeth, as well as an open bite related to tongue thrust? (Photo)

I had braces as a teenager, but despite using a retainer, my gap returned. My bite has never met in the front, but it wasn't until I changed dentists as an adult that the issue was addressed. My new dentist said that my braces were a waste of money and that the tongue thrust should have been corrected before braces were applied. I would like to correct it because it causes a lisp and difficulties eating (biting through), but I don't think I'm up for traditional braces again. What are my options?