I remember when I decided to cultivate (In the old days..we tossed seeds and ran..We harvested anything that grew a few months later. Needless to say..while the weed was free (the 60's)..It stunk in more ways than one..Haha.
Today it's a whole new ball game and all for the better.
I could kill a cactus, but after a month of study, I took my shot and spent about 2k in total. Things worked out fine and my ROI was accomplished the 1st yr. Before that I was spending too much at the dispensarys to keep the pain away and to get some sleep (before cannabis, I spent about 10 yrs of sleeplessness..not to mention buying my legal prescribed meds. (Opioids)
I made a ton of mistakes and was misled by some people on another forum.
Best advice it to keep at it and never say die.
If I can cultivate..anyone can. And then..I grew a few outside..