This is just a quick tip that I came up with improvising and it seemed to help get me out of every problem in this level as you are under fire from lots of directions if you're in the wrong spot.
So whenever you can, use the helicopter
(default controls) on the house you're next going to attack. Then as it is under fire try run around (away from the other houses) towards that house, try to be as sly and discreet as possible. Now once you're close kill anyone that you can see so that you can stand pretty much outside the house, like right next to a door or window (but out of shot so you are safe just standing still). Stay there until your team catches up then goes inside, make sure they lead and then enter the house clearing it out.
By the time you're done that you should have your helicopter ready to attack the next house. If the route that you try to run doesn't work, be safe and backtrack a little bit and find a new way to the house, after adopting this style i eased through the last 3 houses as a frontal approach was not worth the effort.
Hope this helps!
If there is any inquiries or ways I can fix this let me know!