Hey Chandra, applying part of the rent toward the purchase price motivates buyers by helping them build equity.

Normally the tenants understand.If you're having consistent issues with a tenant abusing the HVAC only (if they are abusing other items then it may be helpful to find a new tenant), I know some HVAC companies offer an annual plan with a certain number of visits per year at a flat fee.

BP has various tools to help you analyze your deals (rentals, flips, wholesale, etc). : https://www.biggerpockets.com/investment-calculators7.

Hope this helps!

Then 4) I would get laser focused on 1 or 2 good markets with a realtor that is also experienced with flipping and can help you find good deals. 

@Dan Stelmach, glad it was helpful. 

You may want to check out soe of the legal self help books by NOLO Press.

Electric, gas - Where I am at you can link multiple properties to one account this helps if you aren't doing that.

That doesn't really help much.  

I enjoy helping and making sure investors avoid costly mistakes.