I'll save you the details but...Per door cost: $63,300All in Cost: 700kTotal Revenue: 137k(ish) annuallyNOI: 65-73% (in the expenses we included: insurance, taxes, $75/month per door repair expense, management fee 8%, grass cutting, & a misc fund for random crap business license, etc.)Now...

Hard money typically refers to a company that has it's own underwriting guidelines, rates (9% - 15%), costs, draw process ect.

Whether the seller was open to a buyer commission or not, I wouldn't put an additional cost into any personal purchase.  

This is a blog I made myself, let me know if it helps my goal, to achieve profits because right now their zero (leads)How much does it cost to install a patio door?

The best place to start is with a spreadsheet that has every every cost itemized. 

Costs before that (during remodeling) are added to the basis.2.

Can try to reposition to Class B, but neighborhood may impede these efforts.Vacancy Est: Historically 10%, but 15-20% should be used to also cover tenant nonpayment, eviction costs & damages.Tenant Pool: majority will have FICO scores of 560-620 (approaching 22% probability of default), many blemishes, but should have no evictions in last 2 years.

Also, you can't know how the cost of materials could fluctuate over your project time, so consider purchasing any materials upfront so you can stick to your budget. 

Selling the PropertyIf your parents decide to sell, they could: Sell As-Is: At a current appraisal of $350k, they could walk away with a sizable profit (after transaction costs like realtor fees, taxes, etc.).

You’re on the right track—build awareness of costs where it directly impacts their role, but don’t overcomplicate the program with factors they can’t control.