Obviously not all agents are willing to put in the same effort but I like to think the better ones earn their keep.  

As things stand here in NB for the moment, the best I can hope for from our energy efficiency and net-zero power efforts is reverse metering to the point of zeroing out my bill with the electrical utility.  

I think as @Steve Vaughan mentions "procuring cause" is an important issue with listing agreementsRemember that it's the sellers money that needs to be paid to the listing agent even if they fail to sell the house for a period of time after the listing expires if that listing was the reason why you found the property (MLS)What I do with the seller if we have an existing listing it hasn't expired yet but it's close to expiring, is to ask the seller to contact the broker of record, Bring your listing agreement with them, and have them cancel the listing in writing, specifically saying that if they do rent it or sell it down the road they are owed no moneyAnother possible solution is to give the agent/broker of record some money to reimburse them for marketing efforts, which include signs and Internet labor."

I guess why make the effort if you're just renting out or flipping.

Is the accounting easy enough to do by oneself (is the ration time/effort to cost worth it ?) 

MaxMax,What you're missing is a good chance you'll receive any positive return from your efforts...I don't know about you, but I don't work for FREE.

.- no appliances- renter provided window ac units.You actually REDUCE turn over because the effort to move all that stuff that the renter now owns is high.  

What a waste of effort that was.  

Any advice on home to prioritize my time, more specifically, marketing efforts with little to "0" money?  

Turn key companies do the same and make double or more for the same effort per deal.7500 is a great deal,  and once your done your done you have no equity ownership and no on going responsibilities.