The toilet wax ring has been leaking a very long time, and we discovered everytime the toilet flushed it partially drained through the floor into the laundry room (yuck!). 

Clogged drain, leaky faucet, burner burned out, etc.

You'll need to pump it out, get in there and tear up the bottom so water can drain out.

If the cost of installing water supply, dryer venting and a drain makes sense, do the upgrade. 

Hair and Grease Drain Cleaner-1972 - The Home DepotYouTube also helps wonders.

One of my houses had some issue with the foundation here in the Bay area, with cracks showing at the doorway, and although the specialist told me that it was "not as bad" and "on the cheaper end" (needed to add more support and a drain system), it still cost 30k including permit costs.

You're only supposed to expense maintenance issues like snaking drains, replacing lightbulbs, etc.

There are very specific steps that have to be done with the drain and the lining before any tile is installed.

In dating, you would rather remain single than be with someone who drains all your energy (and resources).

It was an issue I was aware of and willing to accept.Our kitchen sink had been draining slowly since moving in, so I removed the p-traps, stuck a shop-vac in the trap arm to clean out as much sludge as I could, and reinstalled new traps.