Can Anyone Living in UAE Help Me pls!

[zeba]

Hi...

  its been long since am busy gathering information on how to get a visit visa for Canada. My husband is actually planning to visit canada once. i read that we need an invitation from a friend or a relative frm canada, is this true..? i do have my relatives over there and if required we can ask them for one.
 my questions are: is it advisable to seek a consulars help for visit visa.? do anyone know a good consular here in Dubai? my husband's Visa is from Ras al khaimah. his monthly salary is AED 4500
for visit visa, do they require bank statement? and if they want, how many months statement do they need and what is the amount of fund required in the account to proof that he has enough for a month's stay.
i would really appreciate if anyone out there helps us out. and we are holding Afghani passport! =) we belong to Afghanistan.