I am so sorry you have to experience this. I can't imagine going through the stress of finances on top of what you're going through medically.  It is insane as you say. It reminds me to be extremely grateful as where I live it is entirely covered under government health care. I too have been scheduled for iron infusions as well has Humira and I won't pay anything. Granted, our taxes are likely higher but I have certainly come out ahead with all of my surgeries etc. I truly do feel for those who have to pay out of pocket. I hope you find a better resolution to your situation. 

The financial strain is really tough, it's very different here in Australia where health is affordable for everyone.

From my personal experience i could not tolerate oral Iron tablets as they gave me diarrhea and bleeding. I get Iron infusions 3 times a year and they work really well although it can take a few weeks to feel the full benefits. 

Doctors seem to prefer iron IV these days but it can also be given by intramuscular injection. The side effect is that it can be slightly painful. I used to get them 20 years ago. Now I get iron IV  (paid for by the Canadian tax payers) and when you signs the consent and read all the possible side effects, one of them is  actually death! It  does seems to be a fairly routine safe thing now but that's what ir said. The IM injections would be much less expensive if your doctor would prescribe it for you. If you know any nurses it's a simple  thing to do and that would save you money also.  Getting your hemoglobin up you will feel so much better! Another thing you can try is liquid iron and just take a small amount a few times a day. Mix a few drops in your juice and brush your teeth afterwards as it can stain them. Also, if you like Shreddies,  a single serving has 50% of your daily iron needs.