Additionally, I’m curious about how this would apply to properties in provinces like British Columbia, Alberta, or Ontario.

This is an additional step that would not be present for developing a lot where you are adding value.  

The family viewed the house, loved it, and requested that I install satellite TV and add it to the costs, which I did.

Here's the deal: You don't need to withdraw and return the current security deposit just to collect the additional $100.

Whether the seller was open to a buyer commission or not, I wouldn't put an additional cost into any personal purchase.  

If you are able to add an additional full bath, it sets you apart in the market big time! 

I also make sure to specify in the lease agreement that I need proof of coverage before move-in and that the policy should name me as an “additional interested party.”

It is much better to have a reserve fund and add it monthly.

Many lenders also impose additional requirements such as owner-occupancy, and/or that one lender make all of the institutional loans in the building.- Valuation: The variety of financing products available as individual tenant in common loans remains limited, and the terms are generally less favorable than either apartment building loans or condominium loans.

Coffered ceilings, low corner additions etc.Anyone can slap lipstick on a pig, looking for high value add in high demand markets is where the $ is.