Tony does have a point. Personally, I'll help anyone with whatever they bring or let them use my planes. But a lot of the guys at my club are less enthusiastic about some trainers such as the Nexstar and Alpha 40. Not saying they aren't good planes, but these guys just don't like them. Show up with a Nexstar and they won't go out of their way to help, and if they do , the first thing they are going to do is make you mad by yanking off the speed brakes and other useless gadgets. Show up with an Avistar and you will get plenty of help. Not saying its fair, that's just how they are.
That's one reason a lot of people here on RCU reccomend getting help from a club. You'll get more help if you follow the advice of whoever is helping you. If you've got an instructor who is commited to helping you and he loves Nexstars, then you might be better off to get one. It wouldn't be my personal choice, just an example.