Having been on both sides of the tenant/lessor table at different points in the past, I would say that you have several serious issues; habitability is the main one, along with ensuring compliance with all applicable requirements for a habitable residence. If you try to rent it as commercial space- no habitation- you're likely to have another raft of legal hurdles to overcome, this time having to do with whether the property is properly zoned for commercial/industrial space.
Next, growers SUCK as tenants; the damage they cause can be catastrophic- who needs fire when you can flood the whole place, ignore it and get black mold?- and the 'modifications' they make can be very expensive to repair. If you want a grow in there, I suggest you at least oversee it yourself, if not actually run it. The worst part is the amateur growers tend to be the most destructive, with the least to show for it after they've finished. At the very least, make damned sure you examine the references for your prospective grow-renter; he better have a kick ass list of references for his grow ops as well as rental references!
Finally, just because it CAN be a growhouse doesn't mean that's the best possible use for it. Examine your other options, like the cost to finish it and then rent or sell it.