The last few STR deals I closed where my client used a second home loan, they ended up putting down 20-25%, preferring to have more equity in the property versus giving away thousands in fees to the lender. 

Some sellers prefer to work with a local lender, usually advice given to them by their agent.

This for us is preferred over seller financed deals as we can do 65% LTV, 800 credit with someone who has net work 2x+ loan and get double digit rates. 3.

I am in Brent Daniels' TTP Mentorship (which is excellent - HUGE value) and he recommends Batchleads (but not their dialer - for that he prefers Mojo) and I think I should just stick to what he said, but I have serious "shiny object syndrome" - my bad ;)!  

If not, it's your choice but I would recommend looking into it.

Upgrading the panel is your choice . 

If your sister-in-law prefers not to be directly involved, your wife could become the sole owner of the LLC, and your sister-in-law could be given a secured interest in the home after the HELOC is obtained.Additional Considerations:You mentioned owning two other properties.

Id also prefer to converse in person so would I ask the PM and or landlord to meet in person?

1) an investor will pay the least for your house.2) An assumable loan will only help if you owe at least 8-%, preferably 90% or more if the sales price for an owner occupant who will pay the most. 3) it’s been a VERY slow winter.  

Austin is a fantastic market, with its growing tech presence and vibrant culture, making it a great choice for your future career.