You did not say how large or small you wanted to grow.

I can tell you that my first indoor grow had a total cost of less than $25-US

That included everything, light, pot, soil, enclosure for a one plant very small grow. I got about a quarter oz from it but you could get more with a little more patience than I had. The grow space was only 1 foot square by 2 feet tall total.

My second has cost a total of $285-US so far. That is Cabinet, Lights (veg & flower), Hydro stuff (medium, nutes, clone chamber), for a space about 3.75 square feet floor space by about 3 feet vertical space. I still will need to build some type of odor control and ventilation system very soon. Done as sea-of-green style I may get as much as 4 1/2 oz from this grow (18 plants)

The hydro costs a LOT MORE to get started than the soil grow did but I expect much greater results (yield-wise) from hydro. The biggest costs in each method can be the lighting and vent/odor control setups.

hope this helps,
Max Blast