I bought an 05 Sherco 320 as my first trials bike and for me personally, it was a mistake. Yes they can be a pig to start, but with experience you can surprise those people who think you cant do it! Mine had the later camshaft and hot start mod. There's a definite technique which once mastered, starting is a piece of cake. Nevertheless, a mistake for me, it was very torquey and powerful and got me into trouble a few times and I couldnt tame it without resorting to carb mods, flywheel etc so sold it on and bought a 250 Evo, which I love and is more than enough for my measly skills level. Not doing the Sherco down, excellent suspension etc but not for me, there are other threads on here which dont recommend it for a starter bike but as you are returning after a lay off you may be able to tame the beast!
Good luck either way