Do you have a Heat Press? If not, I'd get that first then buy an Inkjet. Doesn't matter which they'll work fine. Try an epson wide format if you can.
I have an old Epson 1280 and its still works great. You can try shopping with Proworld and see if they have a package deal for a heat press, and printer.
Lots of people like buying Dye Sublimation, but then you're limiting yourself to Polyester t-shirts.
You can also just find someone to make things for you and you sell. Cuts down on the headaches.