Do you really have time, and money. to devote to training and cleaning, besides the time you already spend with Nacho? If Nacho is doing well and you spend time with her when you're home she is probably ok as is. Leave the radio on for her, or t.v. when you're gone.
On the other hand... I have 15 so who am I to talk! If you have the time, money, patience... go for it!
The vet bill this week for Frenchfry was $125, see what I mean? Bacteria happens