Which will allow you to estimate (and a whole lot more) for Sheet or Web Litho, Sheet or Web Digital, Screen Print, Flatbed or Reel Inkjet, Wide or Narrow Web Flexo etc. all in the base core module without extra license fees for other print processes.
(Disclosure: I am affiliated with this company/product)
Stay away from EFI Pace (probably too much for a single user). I am currently setting up a system called Print Logic out of Ireland, it appears pretty straight forward, and is like 150.00 a month (they are just entering the US market)
I've done a demo of Quotifly and thought it looked pretty slick. $50/month and it has a lot of online customer-interacting elements that might make a smaller shop stand out. https://www.quotifly.com/