Your location says you are in upstate NY but that covers a lot of territory. Not sure if this is doable for you but I highly recommend you take some classes and go to a big expo. The MQX in Manchester NH is coming up in April. It is the largest machine quilting show in the northeast and all the LA vendors will be there. The class registration just opened up this week so you may be able to get in a hands on longarming intro class that has robotics to ensure you really want to move forward. The vendors have demos both computerized and non that you can play with. Don't rush into anything. Most people research for about a year before taking the plunge. Even if you are looking to get preowned there is a wealth of info at these shows.
https://www.mqxshow.com/home/