The roofer gave me a invoice with high level bill of material, and a statement that it has 2 years of warranty and brand name of the shingles.It does not say brand name warranty or model or batch number etc. 

At the end of the day, 5% of $80 is more than 2.5% of $100 and the fee models used in the industry will sometimes lead the listing agent's to go from being the seller's advocate to the buyers.

**Standard Compensation Models** - **Flat Fee**: Engineers and developers are often paid a flat fee for their services.

While you may be able to measure energy to some precision that you are satisfied with close to the point of delivery - what you will have a very tough time accounting for how those losses are split amongst your units.

@Zhongyuan LuoMany data models are not very localized for properties price or rental comps.

To assist us, we refined our pitch deck and performed some scenario analysis with our financial models.

Hey @Vhernadette Sasing, with your high income and limited time, a solid approach might be investing in cash-flowing assets that are low maintenance, like passive multifamily syndications, or exploring online businesses with recurring revenue models (e.g., SaaS, subscription-based e-commerce). 

This is what we have recently purchases for both 2 and 3 bedroom homes LG 7.3 Cu. ft model DLG7151W , washer LG 5.0 cu.ft. high efficiency top load washer (no agitator) model WT7150CW. dryer LG 7.3 Cu. ft model DLG7151WThe Cleaners love them and recommend them to their other clients to purchase.

Quote from @Alan Hale: Is my modeling wrong?

I called Zinus a few years ago to confirm since model numbers matched the Zinus on Amazon.