I'm going to go against the group here and advise against getting your own printer.
Your main issue here seems to be colors / saturation. This is the hardest thing to do properly in our business, and likely why most of your cheap vendors keep sending you stuff you're not happy with. You need a properly profiled, maintained printer in order to accomplish what you want.
Sure, you can hire someone to come out and calibrate your printer for a few grand... But even then it's not going to be 100%. We always get the random odd color that looks off... and we usually have to spend an hour printing swatches and dialing it in to get a perfect match. This is why most people dont want to touch your stuff - If a production sign/graphic is a shade off, no one will notice or care. If you want absolute perfect, 100% matches that are really vibrant... It takes time. and the time it takes to do your one job, most shops can do 10+ other jobs that pay more, for less work.
But if you purchase your own printer... You need to learn how to print, you need a decent understanding of profiling/colors/saturation/linerization to achieve the results you want... you need to know materials, how to overlam, how to cut. It's not like buying a desktop printer, hitting print and your done. Printing is a fulltime job in and of itself, so many people think they can buy a $10-15,000 printer and make a ton of money, only to go bankrupt in a few months.
take your images and print them on your desktop printer, see how they look different from what you have setup. That's whats going to happen but 10 fold on a regular printer. You're going to have purple greys, orange reds, purple blues, etc.
https://signs101.com/threads/flexi-rip-software-not-printing-colors-correctly.156082/
doing a search on S101 for "color doesn't match" and there will be thousands of threads. There's usually 2-3 per day from someone new asking why their images are so dark... If you buy a printer, I'm sure your name will pop up here within a week!
I'm glad you want to produce high quality stuff, but unless you're willing to put the time and effort into it, buying your own printer is a bad idea.
Your main issue here seems to be colors / saturation. This is the hardest thing to do properly in our business, and likely why most of your cheap vendors keep sending you stuff you're not happy with. You need a properly profiled, maintained printer in order to accomplish what you want.
Sure, you can hire someone to come out and calibrate your printer for a few grand... But even then it's not going to be 100%. We always get the random odd color that looks off... and we usually have to spend an hour printing swatches and dialing it in to get a perfect match. This is why most people dont want to touch your stuff - If a production sign/graphic is a shade off, no one will notice or care. If you want absolute perfect, 100% matches that are really vibrant... It takes time. and the time it takes to do your one job, most shops can do 10+ other jobs that pay more, for less work.
But if you purchase your own printer... You need to learn how to print, you need a decent understanding of profiling/colors/saturation/linerization to achieve the results you want... you need to know materials, how to overlam, how to cut. It's not like buying a desktop printer, hitting print and your done. Printing is a fulltime job in and of itself, so many people think they can buy a $10-15,000 printer and make a ton of money, only to go bankrupt in a few months.
take your images and print them on your desktop printer, see how they look different from what you have setup. That's whats going to happen but 10 fold on a regular printer. You're going to have purple greys, orange reds, purple blues, etc.
https://signs101.com/threads/flexi-rip-software-not-printing-colors-correctly.156082/
doing a search on S101 for "color doesn't match" and there will be thousands of threads. There's usually 2-3 per day from someone new asking why their images are so dark... If you buy a printer, I'm sure your name will pop up here within a week!
I'm glad you want to produce high quality stuff, but unless you're willing to put the time and effort into it, buying your own printer is a bad idea.