that is fucking nasty. i would leave it till the fires have been controlled and extermintated and the hub ub has died down. you would be wise not to do any hasty as this guy knows that you grow and so could easily ring the feds.

so... i would grow some more plants. beef up you house security. then stash all your equipment and put the plants in his house and ring the police.

he should know the risk you take in growing and learn it the hard way.