Cash buying is not conservative, it is ultra conservative and produces very low returns.

Great answer above and I will simply reiterate that utilizing leverage at low rates to invest in other cash producing assets creates arbitrage and so long as you use the leverage responsibly and you do not over extend, I think it is a great idea.

It's very easy to BUY a house, but 100% financing can produce high monthly payments an de make it difficult to cash flow.But, you're getting a duplex, so you may be doing just fine.

Any form of real estate "investing" that would produce significant immediate income are second jobs. 

You get a higher price for the more income it produces.

Hi..i came across a property, and i appreciate for any input you may haveInfo:--------------------------------------------the sellers Real estate agent said..2 family homein its current situation the house worths $308kthe seller is asking $250Kthe house has tenants producing $3800/ monthComps:The houses rehabed afew blocks down  sells around sqft/price $207-$262  i talked with another real estate agent he said 3 families run around $400kEven though this one is not a higher end, it is being asked at $262/sqft   Questions:Does this deal makes sense?

Historically San Diego is almost a sure thing at producing outstanding ROI. 

It's easy to see the cash produced by the asset sale that then goes into your 1031 account and waits.  

Certainly doable, but be ready to grapple with the competition.If your goal is simply having an income-producing part of the property, another option is to look for a home with a basement apartment or carriage house.

I don’t pay the seller for the work I am going to do to get those pads producing.