Major influences
Size of rig
Insulation of rig
Condition of heater. Is kitchen at 75F bedroom in the high 40's?
Consider modifications. The canned peas and throw pillows really do not need to be kept warm and comfortable at two AM.
Where? North slope of Alaska? Quartzite?
Temp maintenance demand of owners. Some tolerate 50's, others 70's
One way to decrease side-effects is to put your generator at attention when you start it and not at parade rest. Means converter and charger upgrades. 6 cells of GC220 will suck 100+ amps when starting off. Six cells of 27 or 31, close to forty amperes.