Baby Pompey Parvo Sickness

Pompey is a 3 month old pug, unfortunately he had an incubation of parvo since the time he was brought home, we still don't want to give up on him, he es our family and best company. He's currently at the vet with a feeding tube and medical assistance he lost a lot of weight and is fighting the disease but he needs to stay more time there, unfortunately we already paid for his expenses and hospitalization fees that we required upon arrival, now he needs to stay more time and we don't have the financial stability that he needs right now.
If you can please help him live.