Main things to look for are main drain leaks, check the crawl.

I intend to try to FSBO at first, before throwing $14k down the drain for realtors.

Are you sure it is the water and not the trap in the drain?

Cut the stack off several feet above the highest drain and replace everything below.

Its not that I need better financial planning because going to school is a little draining on the cash flow, but I was just wondering so I can start researching creative ways to finance so when I graduate I've already done some research.

There are some other things, pvc drain pipe from kitchen is broken from the sink to the sewer line, replace the gas water heater with a electric, a couple broke windows, storm door.

... and while you are caulking the window, clean the weeping/drain holes in the window frame (if it has them) and have a look above the window on the outside and see if water is getting in there.

There is what you MIGHT call a sump hole, but may just be a drain.

I grew up in a fishing community and when I was a kid everyone dumped their garbage over the rail ... many drained old engine oil in shaft alley and pumped it out with the bilge water.

I would rather deal with a slow drain while my husband is mowing then get called while out to dinner a few weeks later.