I'd say it's a bit of a waste of DMT and I wouldn't keep it up forever. I don't think however you did any damage so far and if you take a break from doing this I'm pretty sure you will be fine. Still, taking a serotonergic agonist thát often isn't good. 5ht2x agonists áre stimulating to the cardiovacsulair system and you don't want to risk any damage to that. Also there are probably better alternatives for your purpose then DMT.
I'd say take a break at some point and don't do this for the rest of your life, but don't worry about what you did either. Also, for tolerance this is really a waste of DMT. It's such a deep and beautiful and rich substance, the base of all tryptamines, and I'd treat it with a bít more respect then that (even though I smoked it in a k-hole, which other people may find an odd thing to do, it was amazing and perfect for my conciousness, serene, gold, sacred, beautiful, pure, surreal and utopic).
Either way, the 5ht2b agonism on such a daily basis isn't healthy in the long term, it probably isn't good for your lungs in the long term either, DMT is somewhat harsh smoke. I assume that for your mind and conciousness it ís healthy, and if you need it now, it's probably not a problem. Still, be a bit careful?