Find a flat fee or 1% commission agent that works with volume investors. 

As a student of history and electoral politics, my hypothesis was a flat no, and the research did verify at least most of my assumptions.However, I could have written a book about this topic, and I really don't think I can answer the question succinctly enough in 2,500 words.

Getting a 6% instead of a 6.5% doesn't save you squat if you have to bid $30k over asking with an appraisal gap and then replace the roof 6 months after you buy the property because you had to waive the inspection. 

Some of the rehab costs were too low (central ac 4k but did not account for duct work), needed a new roof (not included in their rehab estimates), etc.

Roof and attic insulation are key factors in controlling the heat load.Commercial HVAC sizing is based on that plus the addition of heat from air supplied from the outside to replace "stale" air indoors - local ordinances often require specified amounts of air replacement - in an occupied space and also from the number and activity of individuals expected to occupy that space.

I’ve painted oil Derricks, built roads, built houses, remodeled houses, commercial painting, custom showers, foundation repair, truss repair, Roofing, excavation, it’s all a good time to me.

A lot of times, depending on city ordinances,  landscape overgrowth, on the home, on the roof, on the sidewalk, garbage near or around the home,  just to think of a few things, can result in violations and fines from the city.

Most people charge a flat fee across the board to each tenant and then eat the difference.Good luck.   

For example, if the investor knows the H2O heater, roof, appliances, or HVAC unit are of different life expectancy than the average the program defaults to, we will have the future ability to enter the investor’s expectancy.

It may require you to maintain a specific liquidity ratio over the life of the loan, or maintain cash reserves equal to a specific number of payments, or upon inspection prior to the loan being Funded, Require you to come out of pocket with cash, for instance, to replace the roof because it has more than two layers on it, replace or grind concrete that has heaved, or embark on a program of replacing balconies that have rotted within a certain amount of time, et cetera...