Man, I would recommend trying to shave your head first. Honestly, I see a lot of red flags with you as a patient.
1. Aggressive balding
2. Low budget (especially with needing a lot of grafts)
3. Low adherence to medication
I don’t see you being satisfied for a long period of time. If you can’t adhere to meds, you have to be willing to get multiple procedures as your hair starts to thin. But with your budget, seems highly unlikely. My suggestion, try to shave your head and see how it looks. That might be your best option.