Looking for advice

[ClubReef]

I'm having a 3-way tank displayed built in my basement right now and I wouldn't mind some advice/comments since I'm at the framing stage:

1) I'm getting an HRV to protect the house from humidity (as discussed in a previous thread). I've asked the installer to put one of the vents right into the enclosed canopy, is this a good idea? Will this promote too much evaporation since the fan will be sucking out air at a rapid pace? My goal is to take out as much moisture and heat at the source.

2) I'm getting a floor drain and water line installed next to the sump so I have a really robust setup...what's the easiest way for me to plan out the water change system? Can someone share their design? My goal is to do waterchanges without lifting a thing.

3) What do I do with the ballasts? I don't want to keep them in the enclosed canopy for the fear of overheating but I don't want to leave them out because I want a very nice 3 way display (no fish room).

4) I'm have 3 -15amp power circuits installed. Do I need switches to go with them? all 3 have 2 inline sockets, 1 is a foot from the ground and the other is a foot from the ceiling..good or bad idea?

Any other things I should do since I'm at the framing phase?

Thanks