Whats your number source of rentals when buying?

I am the only income source in the family and she is a stay at home mom.  

Lots of great local groups around, each with pros and cons:TRIG: meetups once/month, paid membership, tons of local rooted investorshttps://www.trigofva.com/Hampton Roads Investor Group: Free, hosted by investor agents at 1st Class Real Estatehttps://www.facebook.com/group...Hampton Roads Landlord Associtaionhttps://www.meetup.com/HRLandl...

To calculate that I would need a formal source that would indicate the useful life of a typical quartz countertop.

There are hundreds of sources for your loan as long as the HOA has money in the reserve account to weather the storm of a lawsuit.

Depending on the website you can run a search for sales on four family properties as far back as their records go.You could also pay for a lists via website's like list source.

My thought would be spend way more time looking at deals, sourcing deals, closing deals, than reinventing a great well functioning wheel.   

One source of cities to avoid is Neighborhood Scout's 100 most dangerous cities.

Calling on the more experienced house flippers and wholesalers...Generically, what search criteria in List Source (or other list brokers) do you use for finding house flip deals?

For example, the avg annual home price appreciation rate in Jacksonville, FL is 4.3% per year (source: Federal Housing Finance Agency, www.fhfa.gov.)