So I'm stuck and frustrated, can anyone help on some recommendations...My partner and I have approximately a $20k-$30k down payment for a property and would like to get a quick injection of cash by doing a low risk flip.

You will learn to look at things 2 or 3 different ways here as sometimes we say things we dont mean but there is no way to inject a sarcastic tone into the printed word.It is a good practice to always look for another meaning in a post (other than the obvious).

I think that factors such as short supply/ high demand, low interest rates, and asset price inflation due to the massive injection of liquidity into the capital markets will all keep property values elevated for the foreseeable future.

I'm certainly not saying that the effect is immediate, but were rampant inflation to occur due to an influx of printed money (ie, quantitative easing, other efforts to inject more capital into the market, or even an effort to pay off debts to other countries), their are still only so many assets that can be purchased with those additional dollars. 

The communication and what is available often gets muddied the further you go down the chain from the direct source.If they ask you for any upfront fees RUN as fast as you can away from them.There are numerous posts on this subject.It sounds like your whole premise of making the deal work is the financing.I have not seen funding at the levels even close to where you were quoted for a non-performing asset like that.Too many other performing loans that are less risk for a lender to lend on at those low interest rates.Typically unless paying all cash for the deal the value add buyer does not want to use private or hard money because of the very high carry costs (interest rate),points,short term of loan to refi costs,etc.Instead the value add buyer will try to get the current owner (usually a bank) to finance them at good terms and the buyer injects some of there own cash to get the property performing.The debt service is much lower in this situation and funding is easier.I can see a bank that owns the property giving those terms as they have an interest in getting the non-performing asset performing again.To an outside lender it's just a new loan and they do not have the motivation to get creative with it.

Now I need some advice I am able to inject 15 k$ now from my own money to keep things running and I may be able to get around 120 k$ in may for a new investment.

Structure these deals buying an interest in the property, say 50% using seller financing, the arrangement allows for your cash injection to go to your side of the equity.

I have found that true value creation relies on purchasing market value real estate at a discount or injecting value through rehabilitation or repositioning the asset.  

This article  seems like a realtor injected hoopla to sell more houses in those quoted areas.

For that you will need about 10 -20% cash injection.