no you need to do more home work.
I thought I did my home work. I bought a mutoh toucan 20 grand oh yea I am ready to print. Wrong I then bought software and more software then a cutter then a laminator used now a new laminator. I have not even mentioned all the small tools and the computers for design and ripping.
This is all happen in the last year.
Good luck do your home work and then check it again.
I guess the first mistake is working on a small scale. You will need to have a target market and have sales to that market. One thing you can do is to first work out a deal with a local printer on a wholesale basis. Once you have enough customers then purchase your equipment.
We do that now. We don't do enough banner/vinyl work to justify a printer/cutter so all of our work is outsourced. We make a smaller profit on the items, but at least we don't have to take the time to produce the products nor do we have to lay out capital for equipment.