@Lei L. I did see a study once that interviewed former thieves about how they decided which house to rob, and having a dog was at the top of the list of deterrences.
An alarm system is an option, although you will likely be locked in to a contract. If assignable, you could assign the contract to an incoming tenant, but will still probably be liable as a guarantor if the assignee defaults. One would need the alarm company to fully release the assignor from this liability upon assignment-possible, but unlikely. Alternatively, you could continue to pay the security system yourself and include it as a perk for the tenant. This is of course if you are going to rent rather than flip.
I once bought a house that needed rehab, including all new central air, and I installed an alarm system inside and a steel cage on the new outdoor air unit. The next time I went to the house, the outdoor air unit was gone. Someone had got a vehicle into the back yard and ripped the cage, with the concrete, out of the ground. The culprit? My lovely neighbor.
I like alarm systems, motion lights, indoor timer lights, maybe a radio playing in the house, and the above suggestion of dog barking alarms.