HN's home security scenario

[HunterNurturer]

OK folks, here's the scenario (SCENARIO IS POST SHTF, PROPERTY IS ENTIRELY LEGAL UNTIL THEN):



You live in the house marked with the red X.
2 doors front and back, both with london/birmingham bars and front door barricaded when SHTF. Alleyway along side of house barricaded when SHTF. Anti-climb paint on alley barricade, back gate and front and back doors to prevent intruders from getting a solid kick.
Downstairs windows coated in anti-burglarly film, carpet grippers on outside window sills, windows boarded up from inside and the boards hidden by blackout curtains. Blackberry bushes underneath the downstairs window at the front of the house.
Upstairs front and back windows will be used for security ie. watchpost, shooting air rifle/crossbow, throwing boiling water. If absolutely necessary, super soaker filled with petrol to target group of attackers, then petrol bomb. Fire extinguishers and fire blankets throughout the house.
Unsure what to do with main "attacking" upstairs windows. Other upstairs window will be boarded. Main windows may be boarded half-way with only the opening side exposed, which may be covered in anti-shatter film and removeable boarding with small viewing hole.
Bulldog in house as early warning system. 3 bodies inside the house, 2 capable of shooting, 1 of those trained in hand to hand combat and knife fighting. The one incapable of shooting/fighting would be boiling water, arranging ammo and then guarding the opposite side of the house.

So - how would you improve security? What else should I be thinking about? What would be your main concerns? How would YOU attack this house? What little nasties would you put outside to secure the outer perimeter like tripwires or pyrotechnics? If other houses were abandoned, which would you choose as a secondary fighting position or temporary BOL?
I look forward to hearing responses. I know this is hardly the optimal location, but please hold yourselves back from advising me to move house, it's just not a viable option right now.