I think you should get a printer, if you are making all your signs with cut vinyl, that is the reason you are tired, I bought a new VP 540 10 years ago, when i got it, I was very apprehensive, wondering how am I going to pay the monthly lease payment, what if it breaks, what if I make a mistake and crash the heads, where will all the print work come from and on and on, well the gloom and doom never came, in 3 months I was wondering how I ever did without it.
I too was subbing out my printing and yikes it was a nightmare sometimes, a printer could open up a whole new world for you, I now have a True Vis and it prints so well the solid colors look exactly like cut vinyl, you can laminate with a big squeegee, and my TrueVis cuts dead on like a dream, I suggest you get a printer but NOT a small one, get a 54" one, so you can print a 36, or 48" banner, a small printer will not print either one of those, and 2- 4x12 banners could pay your payment for the month.
You are beating your head against a rock if you are trying to make signs today without a printer, also if you want to break into the residential market you could make small driveway name signs with wood and stone backgrounds on polymetal and cut them to shape with a hand jig saw, getting a printer would be the breath of fresh air your shop needs, just DON'T get a small one, you will regret it. my printer has a take up on it, the last time I printed banners, I put 12 of them in the print que and spent the morning out on the bucket truck, when I came back they were all printed, I was making money 2 places at once, doesn't always happen but when it does, well after all it's all about the money.