This would be ideal in terms of cash flow (after a few years) and equity appreciation since you'd be achieving tremendous returns on limited equity in the form of appreciation, principal paydown and tax benefits aside from only cash flow. 

Ideally, you'd want closer to $40k-$50k to feel truly comfortable and have a safety net for your first investment property.

Luckily my customers were pretty loyal to me but you get the point. 

With this info I can provide you with more information as there are some good programs out there but if you are interested in 2nds for example the really good programs for seller financing may not be as ideal as one catered towards seconds as an example.

If so, flipping or active investing would be ideal.

I know people that are really good at their trade (plumbing, cleaning, electrician, etc) but they don't have financial discipline, they don't know how to market, they suck at customer service, they don't use tools to their advantage, etc.Cody Sanchez (lady in the video) buys different types of businesses and makes them profitable by applying basic business disciplines.

I think my ideal investment is a fix up duplex.

I've been a long-time renter in the Portland, Oregon market and would love to purchase my first house hack next year: a duplex or triplex, ideally. 

If you want practical support without being bound to a specific system, an “in-house” advisor could be the ideal fit for you, offering versatility as you build your own approach.

You'll need good contact info for them to be able to collect, and ideally the new address for the tenant however which if you don't have can probably be found easily with some online sleuthing/ contacting their employer, skip tracing software, etc.