I plan on listing the property for sale 1 to 2 weeks before completing the rehab.What are my options?

I would like a granite style, but not sure about the other stone options in terms of what would be best. 

A bridge loan might be your best option here.

You want to go to meetups, meet people, and fall into a mentor by adding deal options, sweat equity, or some other skillset to help them.

An option could be doing some research to ball park what these estimates would come in at and remove that amount from your offer. 

There are lots of options for assumable loans in the outskirts that might be worth looking into

It was fun to look at that every time they lowered the price all June and July.

I can think of several reasons - but the bottom line is that since a HELOC is going to have a higher, variable interest rate, and a DSCR or conventional loan is going to have a lower, fixed rate... it wouldn't make any sense to have the BRRRR sit on the HELOC. 

If you look up REI meetups in Meetup/EventBrite, you'll find loads of options. 

You will then have a few options with that rent money....you can put it into principal or you can start saving it to purchase yet another property.