RE: Much better to use monoclonal antibody therapy since there’s tons of evidence it actually works.
Some questions:
1) At what stage of the disease do you apply this therapy? Can you administer it to yourself at home to prevent hospitalization?
2) How much does this treatment cost? ( from start to finish till the patient is cured )
Typically as early as possible, but there's widespread understanding that it's still pretty effective even after hospitalization. Patients who were heading to the ICU - if not the morgue - can show rapid improvement. It's not a silver bullet, but it's by far the best available option.
"Can you administer it to yourself at home to prevent hospitalization?"
It can be give on an outpatient basis, but I don't believe there's any provision yet for doing it yourself. Currently it's given only by IV. Keep in mind these are bleeding edge, brand new treatments. I don't think they even had an EUA when President Trump got his treatment.
"2) How much does this treatment cost? ( from start to finish till the patient is cured )"
$1,250 for the medicine itself, plus the cost of the infusion (which will obviously vary significantly based on where you are). That's US cost. Costs for drugs in other countries are often massively lower, mainly because they couldn't afford it otherwise.
The effectiveness of a treatment is not based on its cost. Sometimes there's a cheap answer to a medical problem. Sometimes the best answer costs quite a bit. What it then comes down to is: what's your life worth to you?