However, I also understand that obtaining financing for an LLC is often difficult (especially if there are no pre-existing assets or income streams).

Your credit will take a slight hit for a few months after obtaining a mortgage and the bank your dealing with may have a restriction or grace period on purchasing investment property, especially if you are a green investor it may be a requirement to wait for some lenders.

Small business owners have used all kinds of collateral for years, as long as I can remember,, to obtain operating or investment funds

From there, I'd re-invest through equity gained from that purchase.So again: Take out a business line of credit and pay in full, in the interest of obtaining the lowest possible first deal price, then building through equity -bad idea?

The nature of taxation on a gain has nothing to do with whether you had a loan or where the loan was obtained.

And by wins I mean obtains the best possible terms and hopefully these will be your terms.

I am seeking information on how I can obtain SDIRA investors or asset managers with access to them.

What are good ways I can go about obtaining funds with reasonable terms under my LLC?

Maybe you can use that money to pay off some bad debt and obtain some small financing to improve your credit?

I'm trying to obtain a cash out refinance a SFR rental property I bought originally all cash.