You can also use the Enemy Method to check the rates of your competitors.

You can also check online resources like BiggerPockets or Roofstock, which offer general CapEx guidelines based on property type and age.These methods should help you perform a solid preliminary analysis.

If one method of communication (email in this case) doesn't work, you need to try another way (phone call). 

@Marc ShinI recommend finding local meetups to attend. https://www.biggerpockets.com/forums/521I have found all of my best BRRRR connections at local meetups.

Payment methods, tax collection etc.

Only one of these methods involves "saving" money, and most BP users don't pay enough attention to it. 

Hey Matthew,I work a lot in the Detroit market, specifically on BRRRR projects and with Section 8 tenants.

Probably wouldn't do a BRRRR on your 1st deal.

@Elizabeth RossFor properties under 100k you will likely need to use the BRRR method as its difficult to get a 30Y loan on a properties valued under 100k.

One of the biggest mistakes is to focus on solely cash flow and achieving a BRRRR.