I have the same problem. These days the weed hits me like a ton of bricks and if I have it on hand I smoke it compulsively until it's gone. I'm a cheap date when it comes to the ganja. I can stay high all day every day for a week with less than an eighth.
If I had a bit more restraint I could get a lot more value out of it. These days the weed sends me to another dimension and kicks the brainstorming into overdrive... which can be useful in certain settings, but once the burnout kicks in the diminishing returns are inescapable.
Similar situation here! Sadly, smoking all day every day is very expensive!