Noisy Sump Pump

I have a 50 year old house. When it rains, water comes in my garage (just about everytime) from the back wall. Depending on the severity of the rain, sometimes it also comes in at several points on the same back wall in my basement. Had my 1st of 3 estimators out to tell me what it will take to fix. I will be selling this house within the next 12 months, and frankly my only goal for this repair is to end up with a situation where this won't become a deal breaker in the real estate transaction. Guy says I need an internal drain around the entire perimeter of basement / garage (not just the back wall) and also they need to dig down 24 inches or so and repair cracks in wall on exterior of house(not full excavation). He did the whole 45 minutes at the dining room table with his pitch telling me all about table water and footers and the reasons I need this and why nothing else will work. I won't get into all of the details about everything he said, but just in general is this a common thing in to the industry to quote the whole thing? His quote was $9,500. I have no doubt his solution will fix the problem, but will I be throwing money away if I just put a drain along the back wall and install a pump(actually hire someone of course)? His quote seemed to assume that table water was a primary culprit, but I never see water come in through the floor or the other 3 walls. Again, I'm not questioning this estimate, and I have no doubt his is the "right" way to do it, but I'm just not convinced that spending $9,500 is the "only" way to do this. Thoughts?

I am planning on replacing the roof on my 50-year-old bungalow soon and decided it would be a good time to put in some new insulation in the attic as well. The insulation there is the old loose grey kind. I suppose that I'll have to pull it all out first so that there's a place to put the new insulation between the boards. Some of it has gotten wet in places anyway and probably isn't doing much good. a) what is the easiest way to remove the old insulation? do I have to pick it all up by hand and bag it? The second problem is that there's no ventilation in parts of the attic. The second floor of the house is broken up so that there are 5 separate sections of attic that aren't connected. The crawlspace along the top ridge possibly has some ventilation through the gables (at least it looks like this from the outside, but I have no way of getting inside). The other 4 are on the corners of the building (the living area forms a T in the center of the upstairs) and, although I can see daylight breaking through cracks in places, there is no formal ventilation. I've read about the importance of ventilation, but it seems weird that the house has gone this long without any. b)Is there any damage I should look for? How important is it for me to add ventilation now, and what exactly is needed?