Just do it the old fashioned way. A regular creeper, and after you’re done, roll out, roll over onto your hands and knees, and snapcracklepop moangroan into an upright position, reaching for solid handholds along the way.
I could sure have a pro do the repairs for years with $19,900. They should buy those for the shop I used to work in at the refinery. Some of the newer guys would roll back and forward in an office chair from their toolbox to the work.