But I left the farm and worked in industry, where I earned money from my labor (time --> money) to buy the 2,000 calories a day.I knew that if I saved a portion of my income and invested it in income-producing assets (money --> money), the day would come when the income from those investments would be enough to buy the 2,000 calories a day I need to stay alive (my parents were struggling farmers in what is today the Rust Belt and were always looking for innovative ways to survive financially).

But I would consider splitting that off into the separate unit for a rental when you sell ---  of course you'd want to run the numbers/explore the market to see whether the duplex or SFH would give you the best valuation.In an effort to produce more affordable housing, CA is in favor of garage conversions (amongst other things) to create ADUs ('accessory dwelling units'). 

Your best bet is figuring out which state produces the most out of state buyers for SU. 

Hard to really get into this without any specific details related to the financials regarding each house, but I’d start here...If you need some liquidity, I’d run the cap rates on all my rentals and identify the bottom 3 producing rentals.

My suggestion is to work for a major firm and try to work with a top producer in that office. 

Looking to invest in multi family , in small Ontario cities such as Hamilton , Kingston but it will be hard to get good tenants to live in such buildings , SFH look less headache but it is expensive that is it hard to produce positive cache flow with 20% down payment. 

There are too many pitfalls for you personally, and lots of wholesalers end up defaulting on the deal when they don't produce an end buyer.    

Who said he ordered the material for the rehab but still has not produced it after weeks of saying he did.

I do not want or need to take any of the eventual rental income today, I'd like to continue to reinvest it to produce an income stream for retirement.  

However, some are very time consuming and produce limited results.Now this might not be for you, but there is a far better way to reach this people relentlessly month after month until they are ready to sell.