Or, are you trying to fund buying a property + construction, and then cash-out-refinance the completed project to pull back out most of your purchase + construction costs to deploy on the next project?

Doorknocking is also very effective but difficult in the winter months.

I can create an effective Calling Script and Schedule Appointments with the homeowners.

I'm wondering what is the current average cost, and seeking recommendations/advice.Ty 

The one I use charges 8.5% a month, when there is a vacancy they get nothing, when they fill a unit, they get a set amount plus advertizing costs (not one month's rent which seems to be more common in the US), and when there is a problem they deal with it. 

The #1 driver of the replacement cost (and therefore dwelling coverage) is the square footage. 

I was a little surprised at the cost for the services which are $500/month.

If the cost is more than the benefit, don't do the repair.

However, maintenance costs seemed to be never ending. 

Make sure the rent from the other parts covers your loan, taxes, and other costs.