You are not the only one to blow through money, one of my friends had a coke habit, but she is sober now and super happy.
I envy your position, no job to hold you back. You can throw yourself full time into rehab and make that your focus. You can get this monkey off of your back if you get help.
I am a few years sober and my folks are proud of me again. Heck, I am proud of me again.