Look,it's an immutable law of nature that brothers-in law are absolutely useless,noisome troglodytes.
Just accept it for what it is and if dear wife sez"so-and-so can help you,I'll call him",then YOU feign incapacity.
I know,I've been there.My BIL pushes carts at a supermarket,acts like he owns the place.Guess who subsidises his admittedly scant lifestyle?

50 Zloty,eh Polska?train him for the Beijing Olympics,why don'cha,put him on the Polish fencing team.....A little chain-link will do his hands wonders.......Yakshi masch!