Incredible value delivered over many years here at BiggerPockets, and that's JUST on these forums, not counting 500+ BP Money podcasts, more YouTube videos, comments across the Facebook groups, and a partridge in a pear tree. 

When you are getting  down money from other people's money, with floating debt, it's a speculation.

I need money to rehab should i do a heloc on my primary residence ?

Treasury bills are paying 5% and if you stagger their maturity you could have the money ready to go if you find a better opportunity.

You have bills to pay and if they promise you your money by a certain time each month, then you should be getting it.

The other benefits, or lack of, have been covered by the previous posters.In all seriousness, I would not waste your time, money, and effort on an LLC just yet.

It auctioned off to some online bidder for 30k! 

Aloha Julian, Just to add onto what everyone has said, 1-4 unit deals (residential) are typically underwritten differently from 5+ unit deals (commercial). 1-4 units are easier to close and you get more money for them because of how DSCR is calculated:- Residential (1-4 units) DSCR = Gross Rents/Mortgage Payment- Commercial (5+ units) DSCR = Net Operating Income/Mortgage PaymentIt's important to note that in both cases above, there are exceptions.

If you want 10% returns you might have to look in another market, but if you want to park some money in a solid property, as long as it generates enough to break even after all expenses, taxes, etc. to allow you to hold on to it for 5-10 years I'd bet it will do better in the long run than a 10% cash flow property in a lower end market. 

I deposit my paychecks there and for all the time the money would usually sit idle until the bills are paid, the heloc interest calculates daily, so it would be lowered by my deposited income.