Our three bedroom home years back we spent over 400 a month in electric alone when we weren't growing. I imagine the average is about that. 4,000 watts in a 3 bedroom is not an issue, especially if you don't plan to live there and have things like a fridge, washer/dryer and other lights going on.
Thermal imaging is about the last thing you will need to worry about. 4,000 watts in a basement or well insulted grow room built within the home will not attract the law.
When we used a home for only growing in the late 90s we vented into the largest room on the main floor and then had multiple outlets in that room to exhaust out. Two windows with window fans and one inline fan pushing out air through roof vent. Less heat trace if a plane or heli comes around with FLIR.
If nobody is living there then no appliances and other lights will be used so all those grow lights, fans and ect will amount to a normal monthly bill for a 3 bedroom. During the hot months if there is central air there just buy a digital thermostat if there isn't one already and set it properly to keep it cool. Run day at night during cooler hours. Get a few timers fro lamps by a front window and an outside light so it looks like there is some activity going on when you are not there.
Biggest risks are nosey neighbors and telling others of your grow.