I have the nautilus mini i give my tank a tubby when my coil goes to hell. I dump the remaining juice since i rather not cross contaminate with my new coil i love my flavor so its a small price to pay. I only get 6 days out of my bvc coil then i cant stand it anymore im sure it could go longer but love the fresh coil flavor to much.
Perhaps you might want to look into a kayfun or subtank mini? You can use an RBA section where you just simply re-wick it every few days, and the coils can last a long time with dry-burning between wickings.