Epson C-120 and Durabrite inks to start with switching to refill carts and HT inks eventually. Epson 1400 for larger designs switching out the Claria inks for HT inks and refillable carts or a CIS system.
JPSS inkjet transfer paper 8.5x11 or 11x17.
You will also need a heatpress.
You should also educate yourself about custom plastisol transfers.(Ace Tranfers)
Whats available in stock plastisol transfers and name drops (Pro-World)
You also need a tee supply such as Broder?Alpha, S&S Activewear etc.