given your state of affairs, i'd get my priorities in order and sell to pay for rent, food and medical bills. it wouldnt sit right having a pretty ada tank with lots of things not happening correctly and seeing my cat and pain and having both of us sitting on the sidewalk homeless.
some people have created master pieces with basic aqueon 10 gallon tanks, and likewise, people have grown huge messes with ada tanks. a tank is a tank... and the hobby is not going anywhere soon. jump back in when your house is in order otherwise, other areas in your life that are suffering will likely impact this hobby. life just like your tank is all about balance and compromise. just find yours and you will do fine. good luck