The printer comes with epson Durabrite pigment ink as a non option standard. You can buy various makes of pre filled unbranded cartridges, some will have pigment ink some will have dye based ink, so shop around.
If you get a refillable then you can fill it with what you want. Again shop around for dye based ink. Its difficult to be more precise as to sources of supply as I am based in the UK, so my supplier would be of no use to you.
This printer will probably be more than fine to start with, as I don't imagine that you will be doing many highly detailed halftone prints to start with.
The only issue with pigment ink is its opacity when printed onto transparency. As I said just print two copies and line them up carefully. Let them dry well first. As a newbie you will probably make more mistakes than the printer (we all did) so don't sweat the printer too much.
The only time this doesn't work so well is for very detailed work-you will struggle get two films to line up correctly ( been there, tried that).
If you decide against the 7010 then consider the Epson 1400 (1430?) series or 1500 series. They both use epson Claria ink which is dye based. Excellant printers, but probably around $300+. They are however printers that will remain suitable as your business grows.
If you don't want to spend that much look for anything Epson with Claria ink.
Don't buy an HP, excellent tho they are. They have thermal print heads that cause some films to shrink slightly.