Yes...if the holes are aligned
More than a few feet is counter-productive. This lofting action could affect settled density.
Blower had seen better days. Took 10 hours for 82bags
It depends how thick you apply the material. You need a volume to determine how many bails you need.
Fiberglass batting from Owens Corning is easier to apply. Just roll it out to cover all your attic space. It is also easier to remove it you need to get underneath to the attic wiring. It creates far less dust than cellulose. You pay more but get less hassle. Blown-in cellulose is sold heavily compacted so you'll need a machine to fluff it up and a hose to distribute in through your attic. The raw material, shredded paper is cheap, so it is cheaper. On the plus side, YouTube has a carefully done test in which three identical home-like buildings were set on fire the same way. The first to burn down was the one lacking any insulation. Second was the one with fiberglass. The one with this cellulose lasted significantly longer than the other two. (Search for "The Big Burn.") Despite the fact that cellulose insulation is made from recycled paper, the borate fire-proofing is remarkably effective. Also, I have cellulose in my attic and it's incredibly good at blocking out noise, which is handy since I live near an airport.
Yes, but it depends on the condition of the old insulation and the type (batt vs blown in). If it was me, I would remove the old and put down new insulation.
24 bails. Keep in mind, it will depend on the store and the supervisor at the rental desk. I got the machine free with just 12 bails.
3.8 r per inch
Here us a calculator. You’ll need the depth to complete the calculation. ( Length x width x depth) https://www.greenfiber.com/support/insulation-calculator