I hate plumbing!

Currently there is only one unit that is unoccupied.It is a very small two room apartment with a separate bathroom in the shared hallway.We plan to turn this unit into a common area for everyone and the bathroom into a laundry room with a half bath. Since everything else is occupied, i decided to start with the laundry room as my first task.
Here is a quick list of what i intend to do:
-Remove the cast iron tub.
- Wire and plumb it for a washer and dryer
- Replace the sub floor
- install a platform to elevate the the front loading washer and dryer
- re-paint
- fill the remaining wall space on that side with a counter for folding clothes
- install a clothes rack for hanging clothes the full length of the same wall.
- install tile flooring
- install a wash basin sink
- install an overhead light
- possibly replace some of the electric
 here are some "before" photos

 I would like to save the tub but i am not going to cut out a wall or door frame to make that happen. Nonetheless, before i can move it i must unhook it. That was made considerably more difficult since there was no shut-off valve for the cold water. After tearing up a third of the floor trying to figure out where the pipe comes from, we discovered that there is no way to shut off the water to this tub other than the main valve. That means, in order to remove the tub, i must turn off water to the whole house and install a plug. This is not a big deal for a small one-family house but it is considerably more annoying when there are multiple tenants. Since it was late and i was lacking the necessary plug, we decided to wait until the next day to unhook it.
At 11:00pm i received a text from a tenant informing me that water was coming through his ceiling. Apparently, in all of the moving around, we had managed to knock off some of the rust on one of the pipes and cause a slow leak. Since Wal-Mart was the only thing open at this time i bought some tape that claimed to stop leaks. Unsurprisingly, it didn't. Since the leaking water was not going to do any more damage (the drop ceiling piece had already fallen through) i told the tenant to leave a tub under it and i would fix it in the morning.

The next morning i bought the necessary supplies, turned off the water, cut the pipe and plugged the end that i thought provided water. I was wrong. Water came spewing out of the other end after i turned the water on. So, having only bought one plug, i switched it to the other side.
After turning the water on for a second time, i discovered that i had inadvertently knocked off the rust on another connected pipe that ran under the tub. So, by myself , i moved the cast iron tub (which was now full of the flooring and sub flooring) to the only corner left with a floor. I then tore up more of the floor to get to a pipe joint and finally plugged it.

 Then i turned the water on a third time and there were no leaks."And there was great rejoicing. Hooray!"

And that is the story of how i unhooked a bathtub.

Here are a few of the things i have learned:

-I hate plumbing

-If you can avoid it: don't even touch old plumbing unless you are fully prepared to immediately replace it.

- Don't mess with the plumbing while other people are living there.

- Don't ever assume you know which direction the water flows.

- I can finally appreciate pipe wrenches.

- Stephen Eldridge is a good helper.

- It looks like i'm going to replace the plumbing throughout the whole house.

- I really hate plumbing

Well, i fear that i have reached an impasse with the laundry room. The plumbing cant be replaced until everyone is out after January. Therefore i cannot lay the floor or do anything else until then. However, i still need to get rid of that tub. We shall see how that works out.