If she metabolizes it really well, 2 IU's daily (5-on, 2-off) would work really well. Run that until you run out of money. She may need more, though.
If, after 2 weeks, she doesn't feel an increased appetite, more energy, etc., maybe up the dosage to 2.2 IU's. Run that for a couple weeks...if nothing, go to 2.5 IU's. Any signs of hyperthyroidism, remember that dose and don't exceed it. It would be wise to have an IGF-1 serum level panel taken mid-course to make sure she is still within "acceptable" medical parameters.