You'd become a go-to for the quite large MtF transgender community if brewed some estradiol enanthate or valerate at a good price, $50-70/vial. Also, it is not a popular idea yet, but biological females can also use estradiol injections to enhance their physique.
There are only two vendors and both are international with slow shipping and far too many solvents (3% BA, 40% BB) and use MCT oil so the PIP is insane for my girlfriend.
If you sold US domestic, you'd become #1 vendor for sure, and there are a ton of customers for such a thing. As many as there are for AAS, in my honest opinion.
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As far as injectable DHT, there is less customer demand for such a thing, but the post-finasteride syndrome and post-accutane syndrome community would appreciate it. There are no known vendors that sell such a thing.