Pills are very cheap, Wallmart pharmacy sells estrogen by the pound it seems.
Doctor's are way too conservatives in MTF therapies, I don't get how
having way less than pregnancy levels of estrogen in my blood would
be bad if millions of years of women with 10 kids lived through it happily.
They just have got no data and thus they improvise.
There's basically no real decent studies (and with no real money
in this, not likely to be any)
of what we need, its all empirical and even there, the data is
not really well collected.