Funny, I was thinking about this yesterday as my GF was asking me how much it costs to run all my shit (indoor). Her GF spends $500/month with an LP just for smoking material, and we know what that's like quality-wise!! I have 32 sq. ft of flowering space, 32 sq. ft. of veg/clone/seedling space, 4 sq. ft. dedicated to breeding. 1,600w of LED lights, say 2000w total with fans and shit. All-in it costs me around $200/month total, or the equivalent of buying a little over 1/2 an ounce of LP schwagg per month. With my setup I have a never ending over-supply of ~20 strains (I pull and average of 1.5 lbs. per run depending on what I'm running like clones vs. from seed/pheno hunts, 6-7 times a year), make my own seeds/strains, make whatever type and amount I want/need of edibles like caps, tinctures, sift etc. I don't consider my capital as whatever I've spent on equipment is a) written down though my business so there's a tax benefit and b) I'll sell the odd qtr. to a close buddy to pay for upgrades.
So, if you're buying from LP's at their rates, invest <$2000 in a nice setup, another $100/month in operational costs and have as much as you want, whatever strain you want, no pesticides or irradiation, and pay for it within 6-12 months just on savings depending on how much you're buying from LP's today. Winner imo, besides the clear benefits, sticking it to the LP's and Trudy is a bonus.