Ah yeah that was quite a freak thing! Hope it doesn't happen again!
Today I helped my grandpa (one who owned the appartment, my mom's dad) take out a toilet. Quite an experience, as I've never taken out a toilet before. We have a pipe for a toilet in our basement in the laundry room since there were originally plans for a half-bathroom downstairs but that never happened. Not enough space. There's a pipe in the floor for waste sink water too for a sink that was never put in. The pipework for the waste water is all there under the concrete floor but everything else would still have to be done (floor tiled, walls finished, maybe ceiling finished. A lot of extra work and all it would do is eat away storage space. Where the toiley pipe is, that's where I have my cluster of five lights in the laundry room, four cbraheads and the NEMA head in the center. Where I store my F40 fluorescent lamps is around where the sink pipe is.
BTW, are you going to put the wire in conduit? It's probably not required. I'd always use conduit. PVC underground and then lay some gravel rocks over it. With some crushed stone over the pipe, you could drive a trailer truck over it and it wouldn't break. EMT and rigid conduit would rust if contacted with the ground so I'd use PVC under the ground and EMT above ground, though NGrid does the opposite, rigid conduit under ground and then PVC on the wood poles.
With my cutler-hammer disconnect, if i mount it how I plan to and get some nice poles in my future backyard, I'm not sure how I will wire it. I plan to mount it in the garage, which will be connected to the house and finished. I will run a 240V line from the breaker box to the C-H disconnect and from there I'll run the load feed through the wall to outside in PVC conduit and run it up the side of the house to near the top, have a weatherhead and from there have a 240V triplex feed like the electric companies use to the poles. Joe Maurath Jr will probably be able to supply most of the line hardware and screw-in insulators. I'll have to buy the poles of course and probably the triplex feed. I'll probably end up needing to buy the mast arms too. I'd prefer 6ft arms. I have a 2ft, 4ft, and two 30" brackets currently.