Cody, keep in mind that there are several different kinds of Central Vacs and many different manufacturers. Some require large bags and filters that can be expensive. Others have a cyclonic action and require no bags and filters, you just dump the bucket a few times a year, depending on how much you use the system. The filter is permanent and self cleaning, and never needs replacement.(just shake it clean once in awhile, which is what i prefer, again everyone is different)
Some have the ability to suck up water and are hooked to a drain. It will really pay to do your homework when chosing a central system. There are also several types of wall and floor inlets from which to chose,,some are metal, some plastic. Some have the electric 2 prong direct connect hook up in the inlet, others do not, and require a pig tail electric cord, (if you are using an electric PN with the system)
And as mentioned before, there are several types of hoses, attachments, and power heads, electric and turbine.
I have wall to wall thick carpet,in a 3 bdroom ranch style home, but prefer a turbine power head. I also prefer not to have to buy and replace bags and filters constantly. I also prefer not to wrestle with an extra long hose all over the house, so, i chose a larger than required system,(for the square footage of my home) that covers at least 3000 square feet, with several inlets installed thruout the house, and a 20ft hose. Works great for me because my system (which is a Honeywell) is large enough to give excellent power to the turbine, and i dont have to fiddle with an electric connection or electric hose to the power head. The hoses with the on/off feature are very nice,,but not an absolute necessity. Check out the website for MD Manufacturing,,they have several videos explaning in detail the differences and features of the different systems,hoses and attachments.
Also, E-Bay has good deals on hoses and systems too.
MD and many people like the bag systems,,i prefer the cyclonic. The newer cyclonic models have a small window in collection bucket so you can easily see how full it is,,which is a nice feature.
Some central systems have venting for outside the home, others have filters for the exhaust right at the machine, and thats what i have,,which works great for me. I also have 2 vac pans installed with my system, which makes sweeping up a breeze,,very handy. ALso if you have a garage, having an extra inlet out there is great for vacuuming out the car, or garage.
Most central vacs have an inlet directly on the machine itself, so if the unit is installed in the garage, your all set there. Some people prefer to install the power unit in their basement, or closet away from the living area.
One of my friends has all brass inlets installed in the floors of his house,with the power unit in the basement. The brass inlets are very impressive looking!
So, everyone is different of course, you just have to check out all the features and options avalible of which there are many! Hope this helps.