A few years back , I was telling My Dad about My N.H. B.H. and what I do with it . I stated that if I grab a shovel , I could have the project done in 15 - 20 minutes but instead , I sat on the Tractor for 30 minutes figuring out how to get it in position , 15 more minutes getting in position , then 5 minutes doing the
job !!
He Looked at Me like I was a Idiot but My reply was simple , " My Back Don't Hurt !! " .:thumbsup:
In regards to Your gray water ordeal . Been there , Done That !! Feel your Pain !!! :ashamed:
Actually Still doing it . My Dad and Moms place is over 70 years old and for the last couple of years , Every weekend when I come home off the road , I spend a day over there fixing . Sewer , Electrical , plumbing , painting , construction , remodeling , A master of None , But I get by . Most recent project was to rip out a original cast iron tub and replace with a walk-in handicap tub with hydro jet therapy .
3 walls , nothing square with each of the others , plumbing was a hodge podge of SH** . Started at around 2 on a thursday afternoon . Took a break around 01:00 and crashed on My Mom's couch for 4 hours instead of driving 25+ miles home then back in morning . Up at 5 and had tub installed and useable by Noon .
Finishing up that project pretty soon . Tile around tub is complete , still have some other things to deal with in the bathroom though .

Picture above is from when I was still installing tile .
Fred H.