The areas Dawn identified have promise.

We then spent about $1750 on the fridge, dishwasher, stove, and AC window unit.So, if you consider a purchase price of $2000 for the house ($12k / 6 units), we have spent a total of approximately $22,000.  

@Dawn Anastasi, I am talking about $5000 - $10000.

From what I can tell, a home warranty is "optional" but will help cover repairs on "systems" like plumbing, electricity, and appliances (dishwashers, washer/dryers, etc) and as the homeowner, you would pay a flat fee but not the actual cost of the repair.

We actually own and operate a high-end luxury home cleaning business.We hired professional cleaners upon move-out & also had the carpets professionally cleaned at 6 months living there and again upon move-out and used proper chemicals and a professional power washer to clean any oil stains from the driveway we may have caused with our old work vehicle.Our landlord charged us the following odd, ridiculous charges:$3.33 To empty out the ice from the freezer ice maker $1.08 To screw a lightbulb in the bathroom vanity$30.00 To remove a nice black metal paper towel holder we had put in the kitchen cabinet$6.67 To fill and paint a tiny minuscule hole barely visible to the naked eye in the kitchen pantry door$3.00 For a smoke detector battery$3.33 To remove a small piece of duct tape from a wall switch in the kitchen we had placed there because every time someone flipped the switch accidentally it would turn the dishwasher off.

What I recommend is that you find out what approximate costs are for big things like roof repairs; cabinet, and countertop replacements for kitchens; new appliances for a kitchen (dishwasher, fridge, stove); new laminate by square foot, new hard wood by square foot, carpeting, tile; new light fixtures; new door hardware, plumbing hardware; new doors, for front doors and interior doors; interior and exterior paint, by square foot usually I believe; retiling a shower, new sink, new toilet; new HVAC; new windows (per window);Then take all of this info (and don't forget to include the installation/labor costs, because a buyer won't be happy and will lower his/her opinion of your business and abilities if you don't include actual costs.

@Dawn Aotani, Homemasters is a decent size company here that specializes in gutters and roofs.  

Excess cost $2000Appliances for kitchen were estimated at the usual $1500 for all stainless steel stove/oven, micro, and dishwasher.

Hi @dawn anastasi,None to sell but just wanted to hear if/how people are doing it.

@Dawn AnastasiMarcus Auerbach Thanks, guys!