if i were you, buy tools and learn to take apart the bottom brackets and the wheel hubs to grease them. it's much cheaper in the long run, plus you'll learn some new skills. videos are all over youtube or you can ask people on this forum. Most are pretty friendly, a couple bite here and there, just beat them off with a stick if they do..
you should also take the stem and seat post out and regrease it every little while if you're riding it in the rain or so, you don't want it to rust and get stuck. Seized seat posts or stems suck balls...