I said we will help their visit. Showed our account. Showed their account too with around 10 K CAD. Showed their properties and even their two son's job who live in Nepal. I dont know what to show. And for Travel History they have only travel to Canada before. Nowhere else
As per IRCC Son staying in Home country is not a reason for Tie- up or going back to home country.
Yes, Funds (Deposit+ saving bank) and property , Job , Pension letter (If any) show tie up and Finance expense .
May be you need to show more Liquid asset 10 K as per IRCC not enough to sponsor their Flight ticket and expense , needed for their stay in Canada
Another option is you can apply for Super Visa , in this case IRCC look for LICO , and if you have enough earning in Canada as per your family composition, Parents Fund will not impact , Only Case worker will look for your Canada INCOME pass LICO or not. and Parents reason to return back to home country
Good Luck