Any suggestions on how to estimate rent cost for those rental bedrooms and how to go about creating a lease agreement with the person who is renting?

Flipping requires management of money, people (contractors, subcontractors, realtors, inspectors, lawyers,.....) estimating renovation costs, days on market,..... 

Offering money for an estimate where you are paying for their time or working as much to work with their schedule helps. 

I haven’t been in the house yet, and I haven’t done real research on estimating it.

Currently have: 2.999% interest rate on 170K loan of 300K property, 30 yrs fixed (non owner occupied fourplex, purchased 2 years ago)Thinking about this quote: 4.375% with 1% origination fee or 4.875%, 30 yrs fixed, cash out refinance, attempting to pull about 150-200K equity (estimating property value is now 425-450K) out to purchase newer SFH home or duplex to house hack.The rents from fourplex total about $3100/mo.My goal: To purchase a duplex to househack or SFH property to live in for a year with cash from cash out refi.What are your thoughts on this?

., our builder estimates this project would have been ~$37K - ~$55K less 2H 2020) Any other critiques / advise?

@Will Sikes I’ve been having a hard time getting estimates on my deals lately and have just had to throw numbers in on mine until such time as I have something under contract.

So, I figure, I take the asset manager/acquisitions analyst route.

I estimate it would cost over $200,000 to permit and bring to code this additional square footage so it's a big risk for him and the lender to take on.

Call them out on it.One bit of advice to anyone when shopping loans, always get a quote with estimated closing costs.