liking jobos idea there is actualy a plan for a green house somewhere on the net where they have very high smelling legal plants in the green house then a secret hatch and below it has all the ilegal stuff. but if they do a big raid they will use the equipment that measure your house for fake rooms under the floor would be impossible tho
yeah if you have a trap door you'd still have to have something to destroy the plant matter, the acid might work in this situation but it would have to be INCREDIBLY concentrated and the trapdoor opening would release noxious and noticeable fumes and that would tip the cops off to something... if they can get a 7 bladed leaf out of it in time that's probably all they'll need to convict you in court.
the incinerator is the best option. but like it has been said before if you ever hear a knock you better practice a sprint to that room and be able to get their in about 2.3 seconds then you'll have about 2.7 to get the plants in the incinerator, so keeping more plants than you can grab with two hands would be impractical.
and by the time the incinerator kicked on they'd already have the plants taken into evidence and you'd be on the way to lockup.
so really the only viable option and trust me on this you'd have to be fucking QUICK is the incinerator, and you'd have to leave it running 24/7.
heat signatures are only noticeable when the heat is being routed to a specific exit... if it's evenly dispersed throughout your house or attic then it won't be an issue. so really the best thing is to have a low key op, use low power lights and vent into the attic or just the rest of your house. and DON'T TELL ANYONE.