For Estate, one map which I don't like so much but one that I almost always do well on, you can usually get and keep control of the big house using the M16 ACOG + PP2000 set up (M16 out the windows and PP2000 close range out the windows and in the house). Using Claymores now instead of Semtex, not sure if it's a good choice yet or not - seems like I die trying to set them out more than I kill. I'll test a little longer and see what happens.
Perk loadout Scavenger, Cold Blooded and Ninja work well. Scavenger, since I got Pro (faster aiming) is turning out to be a good perk for me, using it more and more on a lot of maps because I feel like it helps me whip up the UMP faster in surprise firefights etc. That is what it does, right?? Scavenger allows you to set out 2? mabye 3 of those pesky Claymores in/around the house too.
Thing is you need fools to come running into the house but I usually dont have a problem with that, they always do, either to get control of the second floor or to get you back. If it gets quiet, I start smashing windows and they usually take the bait and start coming.
Bad side of this I found out last night is I spent too much time on the upper side of this map, so last night in GW Domination I realized I had no grasp of the angles for fighting in the lower part so I got majorly owned (>_<) like, I had no idea where I was getting shot from! nUuuUUUb.