If you only want to do this job once every 10 years, sanitation hose is NOT a place to "go cheap...but you have to buy the most expensive either. Raritan Sani-Flex is the hose I recommend
RaritanSaniFlex hose It's proven to be 100% odor permeation resistant (Raritan even increased their warranty against it to 10 years), plus it has the added advantage of being so flexible it can be bent almost as tight as a hairpin without kinking. Defender has it for <$10/ft and they sell it by the foot.
Measure the amount of new hose you’ll need and buy it (add at least one extra foot as a safety margin). Use sanitation hose throughout the entire system, including the toilet intake and tank vent.
Map out your entire plan and determine solutions to all problems and obstacles before you remove a single hose. Photos can be very useful in helping you map it out, and in finding out what you'll be up against in hard to see areas. In some cases, real time video can even be your eyes while doing the work.
If you discover that you have questions that need answers, or problems you aren’t sure how to solve. Ask those questions
before you start any work, because it’s always cheaper and easier to do it right the first time than it is to do it over!
--Peggie