Gochurchgo, you are far from white trash imho. You deserve the utmost respect for keeping your family together and taking care of your daughter. I too have lived in less than desirable locations. Making do and accepting your situation probably wears on you. Finding respite in music helps soothe the soul. Listen as often as possible.
The distributed bass array helped most of my lack of quality bass. You could use your current sub with two more woofers. I went with 2 cu ft sealed boxes, 2 tens and 1 twelve-used car stereo boxes and subs for the $savings. Will add another twelve in the future. Uses one 200 watt woofer to drive all 3.
Could the lack of bass on the speakers be due to out of phase sub? I have a small 8 inch Velodyne sub (works great). Gave one just like it to my next door neighbor, it is in the garage, buried under. If you would like, it is yours, no charge, just pay shipping-haven't used it in 3 years and it will be given away at some point. You can give me your address at jmoats71149@gmail.com. No strings. I would just like to contribute to an outstanding father. Jerry