Crossandra, hibiscus, morning glory, jasmine does very well in the area where we will have our new home in Goa (India). Temperature is 37C at the highest in summer and 10C at the lowest in winter. I do not recommend keeping these away from light or water. (Must add these to the list of plants to grow when we move there in December.) :)

I was just wondering if you had any seeds from the Morning Glory Tree?

I think the main thing you'll need to do is ensure that you continue to give them adequate light....I have night blooming jasmine as well, and I live in zone 8....and there are lots of other tropicals I over winter inside. With many of mine like Stephanotis Floribunda, Adeniums and other stuff, the main thing I do differently when I bring them in for the winter is to water them much less frequently. Also, if you were fertilizing them, I wouldn't do that during the cooler months. Depending on when you bring them inside and when you can take them back outside, I'd stop fertilizing probably towards the end of September. You probably don't take them out -- even for hardening off until May, so I wouldn't start fertilizing again until maybe June. Make sure you keep them in a warm and sunny place and that you don't let your house temperature get below about 68. Most tropicals that are tender will not survive in night time temperatures that dip below about 65.

Your list of tropicals all have very similar indoor culture and care.  They all need some sun, or at least be placed in a bright window for the winter months.  An east window is perfect with morning sun. 

Dry air can pose a problem since they all enjoy a higher level of humidy that is rarely found in our homes once we turn on the means of heating.  Misting daily would be required, or have a humidifier running to keep a comfortable level of humidity.

Watering....timing is essential since they all prefer moist soils that drain well.  Water once the surface soil  dries to an inch deep (depending upon the size of the pot or container they are living in) This may be once a week or twice a week depending on how greedy the species is such as hibiscus.  

There is no way around the fact that they require all these things from you in order to survive until next year's planting season. 

Tropicals such as most of the bulb, or tuber type plants can be treated as you discribe with no watering, cool dark temperatures from winter to early spring.