Check the source where you found the house.  

Can I purchase a property with a family member and refinance it from a joint loan to a loan in my name only?I'm trying to leverage a family member to bring the down payment and then do a cash out to pay them back for ...

As an investor, I rarely, if ever, consider Loopnet a good source for quality deals. 

However, if you have steady income from other sources, the home cash flows, and is in an area you know and believe in...I believe the best way to learn is to just do it anyway . 

The good part about mentioning you are an investor is that if you make the lender feel you know the game really well, they will treat you like a potential repetitive income source.

And last question, will they put it in the name of my LLC (sole proprietor) if I'm living there or is anything to do with LLC considered investor territory?

OK so is using a HELOC a good way to acquire  more properties so that in he future  I can have a good source  of income  with buying and holding 

Like others have suggested, use google or under the resources tab here on BP there is a directory.If you need fast funding and don't have a private money source, I'd say hard money is the way to go.

Would it make more financial sense to dry up my non-portfolio loan sources before doing portfolio?

Wholesalers are a good source a deals to flip and auctions can be too.