Boy, the stuff you people come up with.  I have been using my sewer solution for almost 10 years now with no problem.  It goes 35 feet and UP 30 inches with NO problem to a bathroom cleanout on the side of my house.  It uses a lot of water especially when I give the black tank a good flush.  NO, I can't use a macerater.  My MH's sewer terminal end is in a compartment with a 6 inch hatch, NO room.
Using my house's new sewer line cleanout will work fine by backing into my MH into my driveway . Stopping with the MH even with the cleanout would be just like using a dump station everywhere.  I asked the question of how long a sewer hose can be is because I wanted the option of dumping from the usual spot atop the driveway.  I normally pull forward into the driveway very close to a hedge on the leftside, thus allowing access to the MH's right rear door. 
I will buy a 20 foot and 10 foot sewer hose and connected them.  I have an extra elbow and will attach that to the end.  I'm sure now looking at it, it will work fine.