I've been supplying wireless internet to a friend in the same building as me. He usually gets 2-3 bars, 2 mostly, but has no problem with the internet. Recently they started renovating the building, and now metal objects and/or electric panels have increased interference to the point he can barely load a web page and is at like 1 bar mostly. My cheapest route would be to replace the dinky 3dbi antennas of my asus rt-n16 with 8 dbi ones. 9dbi vs 24dbi seems like it would give me the extra punch needed? Or will this take a more costly route?