I see a lot of investors buy good investments, but then they lose tens of thousands because they have no idea how to manage.

I will add that to your question of 10% or 20%, you need to ask yourself whether you need the cashflow or not. 10% down would leave some money with which to buy more properties.

BiggerPockets also has a calculator to analyze deals, and I highly recommend you start this as soon as possible, even if you are not ready to buy.

Is there a buy out plan?

The biggest question you need to ask yourself is if you are doing this to afford a property you otherwise couldn’t afford or to save money period, that will lead to very different conclusions about where/if to buy. 

To buy or not in Portland!!!!  

If you sell for a net sales price of $1 mil and buy for a net purchase price of $700K you will owe tax on the difference of $300K.BP may have a capital gains calculator you can use.  

I purchased my first buy and hold SF rental property last year and turned the property into a student rental as it was very close to a local College.

Would you buy it?

I've considered going Dave Ramsey and buying a house with cash and upping my budget to $100k in a smaller market, but that would blow almost all my savings, and $100k just doesn't get you much anymore.