Looking to do first re-hab/flip deal and looking for GC referrals that do high quality work and can respond/provide estimates quickly as deals often get bought up quickly.Thanks

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

Pay someone to take pictures if you don't know how to take photos that approximates professional quality real estate photos.

Doing the latter would improve my cashflow from that paid for unit from 1000/month (for the paid for house left as is and cashflowing) to about 1250-1400/month of cashflow with the cashout refi used to leverage 3 more properties.I intuitively understand that the refi method will in the end make more money, since I'll have increased my house numbers by 3 (from 3 to 6), adds ~450K to my portfolio in house values (each being roughly 150k) and will have renters paying down the mortgages and also covering taxes and insurance as well.  

I have a great credit score with about 7% debt to credit ratio but picking the proper finance method to acquire properties keeps me from pulling the preverbial trigger :(

I came across a video where a lady broke down how to pay down a mortgage using  HELOC her method seems doable not sure if I can post the video here if I can let me know  and I will share it..My question Is it worth doing this with a rental property ?

I would like to share a thought I had about the trifecta to look for when hiring a good GC for your flips; Quality work; get the job done in your time frame and within budget. 1st, I once heard on 1 of the BP podcasts (sorry I don't remember who it was on which #) that you can find those that excel in 2, aspects and the 3rd is "okay", but you will rarely find a GC that specializes in all the aspects.

Bottom line is, I would buy quality buildings built within last 20 yrs and plan on doing some of the little stuff myself if I had a full-time career.  

Are there any pros/cons to this method ?

I believe it is a tight for deals to flip on the MLS right now and more creative methods are working better.