Sources are quite easy to find if you happen to download scanslations. Official sources are unknown for me though.
MangaHut is a great source for scanslations, as it has a small subscription fee which allows you to access to their whole catalogue.
As for readers, you'll be better making a huge sale because you're going to need some cash. Considering the normal manga page 8 inches in size, something below that is something you shouldn't consider. You could look for the iRex series, concretely the more recent DR800 and DR1000, the whole 9,7 inch pack (iPad if you're not a hardcore reader, Kindle DX, and some which will come later)... and that's all for now, I guess.
BTW if you don't mind selling to foreign countries, we could discuss some of your catalogue in private ^^
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