While working on my 05 Neon to repair it after hitting a deer, I thought it would be a good time to go ahead and do the timing belt and water pump. Car was nearing 100K and seemed like the thing to do. Now I'm regretting this decision. So new timing belt, water pump, serpentine belts were installed (and radiator and headlights from the deer damage). Also replaced the oil sensor (leaking) and changed oil/filter. Now job all done and car back together, but car wouldn't roll over. I knew the battery was rather week before starting the work, so went ahead and put in a new battery. Then when it rolled over the starter seemed to struggle and alternated between rolling and grinding. So hoping that it was a bad starter and not anything worse, I bought and new starter. Now it only starts to roll if I roll the engine to a non compression point. The new starter won't even roll it over. So now I'm running thru all I worked on trying to determine what I've screwed up and not knowing where to begin. This is the 1st time I've attempted this job and of course did a little research before beginning. I know it is an interference engine and tried to be very careful not to mess up the timing. I aligned the two timing marks like instructed at TDC, and once the belt was removed, did not move the crank or the cam independently except the crank back three teeth and forward two to give some slack for putting on the new belt. after installing the new belt and adding tension, I rolled the crank clockwise 2 rev's and found the cam mark was 1 tooth off. Made the adjustment and rolled the crank again and the marks were aligned correctly. At this point, I keep thinking that I've got it out of time and am really screwing up the engine every revolution, but don't know how I could've done it or how to check it. I've turned the crank with a breaker bar and socket and it seems to roll pretty easy, but that is relative since I don't really know how hard it should be. Any ideas on what this could be or what I should be checking would be greatly appreciated. Thanks in advance.