What is the best way to leverage my business to start investing?

[Julian Hendrix]

I have several more months before I pay off my cc debt and the last of the payments on the building for the business that I bought. After all is said and done I should have an extra $4500per month of cashflow plus whatever my business building appraises for (around 150k) to use toward buying 1 or more multi-family apartments that are selling in the area. My question is what is the best way to leverage the building I will out right own, so that I can buy more assets in the area. Should I go with a HELOC, or get a mortgage on my building to buy more places or it there a better route I could be taking? Also what should I be doing to prepare for when I'm financially ready to start?