Hi tplee,
Quite an endeavor! I have two suggestions.
- Enlist some help-at least one non-family member and hopefully one family member to learn the layout and it's intricacies. See this post: My dream\nightmare layout
- Complete the around the wall area to framed, decked, track down, wired and trains running. This will provide a stage of completion and fun because you'll have trains running while you work. Check out the progress since April 2013 by this forum member: New layout progress It appears that you are more than half-way there from viewing the photos.
Please post your progress. It should a very nice layout when completed.
PS-SC-2's should allow you to use the iPad. Adapting the sensor track is another story.