I am comfortable injecting $100,000 of the $500,000. 

This is the one i bought PowerBoss Gas Pressure Washer 3300 PSI 2.5 GPM Powered by HONDA GX200 with 30’ EASYFlex High-Pressure Hose, 5 Nozzles & Detergent Injection

In Fayetteville I'm usually around 75% total injection versus ARV.

Also, are the investors funding the entire purchase and then refinancing out the large portion, or are you pooling investors just for the equity injection? 

He owns a budding business and needs to inject capital to accelerate growth.

don't think in terms of downpayment, think in terms of LTV. are you getting an 80% LTV loan, if so you'll need 20% equity either built into the property of from your added liquidity (downpayment). a conventional cash out refi for fannie mae is 75% LTV, so when you do yuor rehab you need to add an additional 25% added equity in order to refi without any additional injection.

Other central banks in the world followed suit, and the European Central Bank, Japanese Central Bank and the Chinese Central Bank also printed trillions of dollars and injected liquidity into the financial Marketplace.

I was redoing a house and they wanted me to do injectable foam in all the walls and under the floor because I "broke the exterior envelope" as part of the remodel.

Sometimes they'll give you a cash injection right off the start to get you going.Otherwise, you could try buying it with a construction loan attached to it. 

Your market is ideal to turn your 1.2M equity into 2.4M in 5 years through smart leverage with no additional cash injection and no greater risk than you have presently.