There are multiple issues in your case:
1. I suggest you quickly email the property documents and valuation + any other documents which prove each applicant's individual strong ties to the visa office
2. You must get new additional passport booklets issued from your passport authorities immediately for your wife/son. You should not have submitted an already filled passport booklet. IRCC needs at least one blank page to stamp the TRV.
3. Alternatively to Point 2, you must get their passports reissued immediately otherwise if they are approved for TRVs, it would be really short validity until June 2018. So much of efforts and waiting for almost nothing
After they are issued the new passports, you must inform the visa office immediately to process their TRV applications with the new passport numbers.
The visa office will not ask you to renew their passports and submit new passports. IRCC would instead issued short-validity TRVs