Is there a possibility you could purchase or built a grow tent & just tell your landlord (should he ask) that its a free standing wardrobe? Or if you have a good will or something similar, purchase a used wardrobe & convert it into a grow cabinet. If you can do that, grow SOG, use T5 fluorescents with CFL side/ supplemental lighting, & a small 4" exhaust fan on an inconspicuous side (complete with carbon filter). Install a cabinet lock on the doors, you'd be good to go. As far as helping you find a place to rent grow space, we'd have to know what state you live in.