Carbon_Dude is right.  Hydraulic lines that comes with the brakes is more than sufficient if you buy hydraulic brakes, i.e., shimano.   I think Avid mechanical brakes like BB5s and BB7s come with housing also....not sure but not enough to run full length to the rear.    I bought 10 meters of Shimano SP41 housing for the shifter.  I run a 1x10 setup.  Let's just say that I have enough housing to do another 20 bikes.....way too much but I do have three other bikes to work on so no problem.  The shifter cable runs internally for the most part.  No housing inside the frame.  You will only need a few feet.....a short length for the top and even a smaller one in the bottom.... Lastly, depending on the shifter you buy, it might come with housing already so no need to buy anything additional.

Definitely can handle a lot more....there just isn't much down here to challenge....

Thanks!

My main trail bike is FS Trek but this one will definitely get a few trips for sure.  As a matter of fact, I'm doing a 62 mile Everglades ride event next Sunday with it.  Looking forward to it.