There is a big difference between clay and cast iron and any plumber should know which is which.

I’ve gotten by with just cleaning the roots out annually at a few of our properties with clay pipes, and just replacing sections of collapsed pipes at others and the highest I’ve paid was $10k for replacing a ~30 foot section of collapsed orangeburg (that stuff is the worst).

There is a lot of free content out there from people like Pete Reese, Jack Bocsh, Clay Hepler, Travis King, and more.

Quote from @Clay Collins: Jessica, There is a great meetup at Brock's Gap Brewery once a month.

Inside these chimneys might be clay liner tiles.

Thanks all in advance -Clay 

PS the foundation issues are caused by Yazoo clay.. in the newer homes the builder dig out a few feet and then rock up before foundation.. the old homes are just  laying on the existing soil ..

@Clay Kallman we just started using Appfolio as well.

Quote from @Barry Clay: Relative beginner here, I put an offer on a 2nd lien for 14K non performing note in Florida.

@Clay TeegardenThere are no capital gains in flipping.