What are the other Neps that are growing and pitchering in the setup you are describing? There is a huge difference in temperment between maxima, alata, ventricosa, Ventrata and hamata. The reason N. hamata, lowii, macrophylla and those other grail species are dfficult is because you need to provide them quality CONSISTENT conditions in order to grow, flower and thrive. Many other species are easier to bend to a lazy humans will and still perform quite adequately.
For my highland chamber I have everything automated with lighting timers, humidistats, fans, air conditioner when my local nights are above 55*F and days above 80*F. Providing such a setup will ensure you are able to provide what these finikier species need. It's a luxury for some of the easier species I grow but I doubt 100% that I would be able to grow the species I am without a proper setup.
Here is the stats on my highland chamber year round figures (winter-summer):
Lighting: 400W power compacts & flourescents
Day Temps: 65-80*F
Night Temps: 40 - 55*F
Humidity: 80+%
The humidistat runs the humidifier about 1/2 an hour every hour but only intermittently, 5 minutes here, 7 there... to maintain a steady high RH. Much of the time the chamber is filled with ultrasonic fog from the humidifier.
Air flow: the chamber always has fresh air blowing in through the humidifier duct either from outside the house (nighttime) or in the room (daytime/winter) so the plants always have access to fresh gently moving air.
Theres a bit more info at my site:
http://www.nepenthesgarden.com/cultbasics.htm
My advice is get your dedicated highland nepenthes chamber setup and then get plants, they'll always be available.