These typically account for about 80 to 85% of all expenses in a flip.If you know the lenders' terms and the loan duration, lender fees, the second greatest expense, are easy to calculate.

@Byoung Bae would NOT recommend an inexperienced investor try to DIY manage OOS anything other than a Class A rental.The odds are against you and you will statistically lose a LOT of money.Read below for some friendly advice:-----------------------------------------------------------------------------------------------------------Recommend you first figure out the property Class you want to invest in, THEN figure out the corresponding location to invest in.Property Class will typically dictate the Class of tenant you get, which greatly IMPACTS rental income stability and property maintenance/damage by tenants.If you apply Class A assumptions to a Class B or C purchase, your expectations won’t be met and it may be a financial disaster.If you buy/renovate a property in Class D area to Class A standards, what quality of tenant will you get?

The reality is that imposing expensive and time-consuming sprinkler installation requirements will drive property owners to either scale back necessary renovations or avoid permits altogether.Currently, when owners propose substantial renovations, they are often informed that their projects will require sprinkler systems, which can cost around $45,000 for a typical three-decker.

How do these deals typically perform in terms of cash flow and equity growth? 

If the property is a rental property (not a primary), DSCR loans are typically a good fit for your scenario.

I've found the people who want to charge for their time and "mentorship" typically need the money because they are struggling- maybe not the best person to take financial advice from. 

For example, ask about typical costs for HVAC repairs, plumbing issues, or roof work.- Use Historical Data: If the seller has accurate financials, their expense data can be invaluable.

Also, for context I am renting out my first multifamily property in the Boston area:- How typical is haggling when it comes to agreeing on rent?

If you're strictly buying turnkey properties and financing with DSCR loans, keep in mind that you'll typically need to put down 20% or more, and because of the higher LTV, you’ll often get the highest interest rate available for your credit bracket.

Very different from a typical insurance company.