Do we, for example, sell our current SFR and put all/most of the equity into a down payment on the duplex and have a lower monthly mortgage payment?

Example of a rental contract.  

Typically, other turnkey providers have their list of preferred companies but Martel turnkey sends out the email intro for you - which was one less thing off my plate as an investor.Before I got in contact with Antoine there was a property I wanted to buy on his website but it had been listed as “sold” on the day I was scheduled to speak with him.

Here is why properties typically need long hold to do well: 1( the selling costs are significant.  

40% down is more typical of a bank bank, 70-75% should be possible. 

These are typical flip deals in bay area but there's always "special situation".- In San Francisco duplex near 101: was listed 700k now listed for 599k.

it’s a closed system and  no clue what’s happening behind the scenes.they have unpaid tax bills on their properties and they have taken loans on top to pay those bills because the property revenues can’t cover those bills for example this one https://www.lofty.ai/property_deal/4318-Clybourne-Ave_Clevel...

A lot of you guys are either missing the point or maybe just work with a very different demographic than I typically work with.

For example buy 300k property, renovate it (pay yourself essentially)  turn into 400k+ plus home, increase rents and cash flow.   

:Class A Properties:Cashflow vs Appreciation: Typically, 3-5 years for positive cashflow, but you get highest relative rent & value appreciation.Vacancy Est: Historically 10%, 5% the more recent norm.Tenant Pool: Majority will have FICO scores of 680+, zero evictions in last 7 years.Class B Properties:Cashflow vs Appreciation: Typically, decent amount of relative rent & value appreciation.Vacancy Est: Historically 10%, 5% should be applied only if proper research done to support.Tenant Pool: Majority will have FICO scores of 620-680, some blemishes, but should have no evictions in last 5 yearsClass C Properties:Cashflow vs Appreciation: Typically, high cashflow and at the lower end of relative rent & value appreciation.