What happened was that the inspector stated there was no power for the ac when he was there, therefore my agent didn't include the ac fix in the repair list, after the escrow closed and I've handed my house over to the management company they came back to me telling me the ac is broken, needs to be replaced, as well as the fireplace, the gas pipes are all busted as if it got burned completely before.

We make it a business practice to never ever show a home unless it is completely showable, Some people may disagree with this and show them early but we got burned so bad we went full scale the other way.

Nevertheless, I want to be more focused, efficient, and profitable in my real estate investing (you could say I have a burning desire to do so).

I'd be drawing a hard line with these tenants, with an official company letter notifying them of their breaking the lease terms by operating space heaters in your property, I'd also be pursuing having them pay for the electrical problems you're paying for or at least notifying them that you're examining the issue and will be deciding whether they are liable for the damages.Next time, next winter, or next month you could be instead answering the phone from the fire dept that your property burned down or the police that a tenant died or were injured in a house fire caused by space heaters that they have used because the landlord never said the couldn't, no record exists of you denying their use and then the next call is from someone's attorney suing you for a wrongful death, based on the precedent that at one time they had to use them because you admitted or inferred that there was a heating issue with the property due to them contacting you about an excessively high heating bill and at that time you were pursuing all sorts of corrections to the problem.Instead I'd be telling the tenants there is nothing wrong with the place, stop opening the windows and space heaters aren't allowed.I can't tell you the amount of tenants who have tried to tell me what was wrong with something based on a symptom.

I guess I was leaning towards the burn out part of the statement, if you don't allow yourself to have a break will that in turn lead into burning out?

I learned the hard way and tried to do too much too soon and we burned through almost 1500 and really only got 1 deal out of it.

It had carbon build up on it so I think it was not burning cleanly.  

Or any burning questions I should ask of this management company? 

Ditto kids and their piles of unused toys.Formal dining rooms and "bonus" spaces are so last century.Where we once chose to test the limits of the planet's resources by (quote the pope here) "breeding like rabbits," we now limit our offspring and thus need fewer bedrooms.Where most of us once had giant SUVs taking up space in a big garage so that we could burn expensive fuel and hours of each day commuting into downtown from the 'burbs (the only place where we could fit all of these toys), we now own bicycles, bus passes and own/share sensible small electric vehicles...

(I already have a lender in place.)Though I agree, he doesn't seem motivated enough - but I do think I could have done a better job at figuring out why he wasn't interested in seller finance and addressing that issue, but I was afraid of being pushy.At the end of the day, we ended on good terms, and he said he'll call if he changes his mind - not as good as getting the deal, but better than burning the bridge.