I think you are in a good situation to negotiate if your agent is also offering PM services.

Not due to your fault, but delays by others; ie utility hookups or change in service, Use and occupancy permits, and the time to get the property up and fully rented. 

Catching up with unclaimed depreciation is considered a "change in accounting method" and, as such, you're NOT permitted to fix it by amending past returns.The correct procedure is to file Form 3115 with your next tax return and catch up with all missed depreciation at once.

Pay a bunch of money to loopnet for their service (not worth it for small scale).

From what I have read off of websites like taxtips.ca and  canadaone.ca, you only need to collect the taxes on goods and services sold once you have surpassed $30k. 

How do I sell my property what is the procedure, seller and buyer commission, why does a attorney need to be involved etc?

@Samuel HostonIRA Services Trust Company is a popular one and they have been in business since 1978.

We are selling a home with owner financing.  We are looking for a company who could maintain the loan and report it to credit bureaus to help improve their credit scores.  Does any one know a good company to use?  Tha...

Their official name is Investment Property Exchange Services, Inc.

You can definitely negotiate with the same vendor as a team, but have separate service contracts for trash/plowing/landscaping/cleaning.