Isuzu Repair: 1996 Rodeo Wont start, charging system, fuel pump

Question
My Rodeo won't start. In the last month i have replaced the battery, starter and alternator. A week ago it wouldn't start, when first turned over the lights would come on but nothing else. Replaced alternator. Then by miracle it cranked and worked for a week not back to not starting. I don't know where to look next. I was told it could be the ignition switch but wanted to see where you suggest to start. I really just want to get it started so I can trade it in. I work full time and school full time. I don't have time for Rodeo issue's since their seems to be so many of them. Any help would be appreciated.

Answer
Well Emily stating Rodeo's have a problem is the step to dumping these pieces of crap for good!!!!!The only thing that I would do is have your starting and charging system looked over very good. It sounds like a bad connection or it could be a bad fuel pump. These both can be checked for like 15-30 dollars. So The best thing to do is go from simple to complex, and also to ask me any other questions you might need to ask and don't hesitate okay Emily? Thank you for your patience.