I have two Dolmar (Makita now) saws. One that will handle up to a 24" bar and one that will handle up to a 36" bar. I just picked up a Poulan Wildthing at an Estate Sale for $10. All the fuel lines were shot and I had to replace the carburetor and sharpen the chain so I'm into it for $40. It fills a nitch between my other saws.
Every once in a while a big Stihl or Husqvarna or Jonsered shows up on Craigslist and Facebook Marketplace around here for a descent price. Sometimes Shindaiwa (Japanese Jonsered) show up also. I don't have much need for anything bigger than a 36" bar although I did put eye prints on a new Shihl with a 42" bar at my local farm and ranch store. The $2300 price tag kind of put me off though.
Have you looked into something like these? They might work if you're not doing commercial work. They're probably not as good in the long run as Stihl or Husqvarna
https://www.amazon.com/NEO-TEC-NS892...07&sr=1-3&th=1
https://www.amazon.com/2-Cycle-Chain...%2C180&sr=1-27