I think I have the basics down:* rent roll or proof of rental payments over x period of time* copies of owner paid expenses* copies of owner repairs over the last couple of years* clean title search* home inspectionWhat are some of your favorite questions?

Additionally, ask for copies of all tenant leases, any recent inspection reports, and records of capital improvements, such as repairs or renovations.

It's oversaturated with crappy wholesalers who don't know ARV and can't estimate repairs costs. 

I am having a sewer line repair company come out and give estimate to repair vs replace. 

I would say a common error that people make is underestimating the cost to fix or repair something.

Renovated with cosmetic updates for immediate rental income, it offers strong cash flow while preparing for more extensive repairs and the addition of an ADU.

The trifecta is making the owner and property manager happy, compensating for the extra risk, issues, and potential repairs, and encouraging the resident to limit the number of pets and be sure they are not damaging the property. 

If the existing ceiling paint is damaged, the ceiling must be scraped, repaired and painted.

Overall, it can be a profitable business, but most people get into it to become an investor and 99 percent fail right away because they don't know the slightest thing about repair costs, talking to sellers, and are only in it for the money and not to help people.

Keep in mind you need to account for soft-expenses as well such as Vacancy/Turnover, Maintenance/Repair, and Capital Expenses.