You are all over the board. My heart goes out to you and your husband because you lost your jobs. Go to google, type in "financial assistance for dogs" I found about 8 organizations that will offer financial assistance to people in need of caring for their dogs that need care or will have to give them up. I will tell you, you may have to jump through some hoops and prove financial need and have a vet reference but they can help.
Sounds like a food and/or flea allergy. Get a better grade food the first ingredient should be a protein, stay away from chicken, try grain free. I purchase Blue Buffalo salmon and sweet potato. For a 30lb bag in Ohio is $56. Kind of high but with two dogs and adding raw veggies it lasts over a month, don't follow the recommended portions, My 80lb gets a 1 1/2c a day with raw veggies and he is satisfied and full. By then you can save up for the next bag (it's on sale a lot) You don't have to get this brand, it's just what he would eat. Bathe your dog in Dawn dish soap and rinse/dry well. The fleas will drop off. Dry rashed area well, put on cortisone or benadryl cream put a shirt on the dog so she can't lick it off or offer benadryl (get vet dosage recommendation for your dog). Vacuum, vacuum, vacuum and remove the bag or dispose of debris in trash bag outside in can, especially under furniture, fleas love dark spaces and corners. Place a pan of water with dish soap is a safe place where dogs can't reach or drink, fleas on carpet will be trapped and drown. I am not a vet nor a tech but this is what worked for me. Get a good flea treatment, you can order online (cheaper)
Develop a good relationship with a vet of your choice, I developed such a great relationship that when my boy needed major knee surgery he was willing to allow me to post date checks bi-weekly in order to pay the bill off and it wasn't chump change. Due to our relationship he has allowed me to do this even with simple visits where other's are required to pay up front or get Care Credit to pay the bill. Good luck.
Taana n Beastley