Stephen,
Set up a quarantine tank in the garage....that will appease the wife as it's out of the house.
As to the acclimation process, I add a my tank water in a three step process, adding maybe 15% of the volume the bag then maybe another 25% and finally maybe 40% within a period of 30 minutes. I always ask for a large bag.
Find yourself a LFS store you can trust and like I said, test their water from their African section of tanks.
Rearranging the decor like you do is an excellent way of introducing the new kid(s) on the block.
Again, a quarantine tank is a must have in this hobby. Lastly, work on that wife of yours....I've been working on mine for 15yrs but at this point, I will have to sell my cars to make room for tanks because "no more tanks in the house" is still her mantra!
Good luck!