How much do you use the saw? How much do you cut at one time? If you're cutting less than a truckload at a time, I'd STRONGLY recommend an electric chainsaw. That will certainly fix your starting problems moving forward. If you go this route, I'd recommend buying a brand from a company that's known for making good battery powered tools, NOT from a company known for making good 2 cycle engines. In the case of the latter, you are paying serious premium and the only thing you're getting is the name plate on the side of the tool.
If you're cutting enough to justify using gas instead of batteries, then get an Elastostart (Stihl) starter rope for what ever saw you end up using. I bought one on a whim 20 years ago. All of my saws now have them. They make a HUGE difference in my opinion. They run between $20 and $30. I'll put a link to one on ebay below. The same size pull rope fits the 240 series, 260 series, 290 series, 360 series and basically anything in between. Installation is SUPER simple.
As far as which gas saw, the MS250 series has to be the worst saw Stihl makes. Almost as heavy as a 60cc saw with barely enough power to run a 16" bar reasonably well. A Dewalt cordless saw will literally keep up with it. The ONLY advantage that it has over the battery saws is that you're limited by how much fuel you brought instead of how long the batteries last (they last a reasonable amount of time). If you're going to buy a different saw, there's NO WAY I'd recommend a MS250 series saw. The MS261 is a lighter saw with substantially more power. On 50cc saws, I don't think a decomp valve makes any difference in starting effort. Not nearly as much as the Elastostart pull rope.
https://www.ebay.com/itm/3854075021...y5IZE7AJDjs11WNIja7SokJRvV8-BZSBoCDBUQAvD_BwE