I assume something like this is more than you want to tackle for a 1st quadplex (https://www.realtor.com/realestateandhomes-detail/241-W-King...), but what about this SF for a BRRR (https://www.realtor.com/realestateandhomes-detail/2101-Arapa...)? 

The problem is no one book is going to be detailed enough for your specific state and county.Right here on BP there are lots of discussions about tax liens.

Always have a detailed scope of work and a price in a written contract.  

If you’re interested in more details, feel free to reach out!

Details can be found at https://www.biggerpockets.com/forums/521/topics/1224992-brew... 

Get the details here I'm really looking forward to learning from some of the best real estate educators, and then being able to take those lessons to smaller accountability groups to be able to discuss putting them into action with motivated peers. 

. - We help with stress and time off.𝗧𝗵𝗲 𝗽𝗹𝗮𝗰𝗲 𝘆𝗼𝘂 𝘄𝗼𝗿𝗸 𝘀𝗵𝗮𝗽𝗲𝘀 𝘆𝗼𝘂𝗿 𝗶𝗱𝗲𝗻𝘁𝗶𝘁𝘆 𝗺𝗼𝗿𝗲 𝘁𝗵𝗮𝗻 𝘄𝗲 𝗴𝗶𝘃𝗲 𝗶𝘁 𝗰𝗿𝗲𝗱𝗶𝘁 𝗳𝗼𝗿.When people feel important, they do their best.When teams trust, they do great.When health is important, work gets better.I work for BiggerPockets, a company that truly takes care of me and it's employees, which only pushes me to be true asset.

@Thomas YoungmanThank you for such a detailed response.

https://www.realtor.com/realestateandhomes-detail/1853-S-Gai...

I was recently sent details about a 20-unit apartment complex that I’m interested in, but the seller's asking price doesn’t align with the numbers I’ve run.