Separate book sand records are maintained to reflect income and expenses for each rental RE enterpriseNote: A separate real estate enterprise may constitute multiple properties as long as all commerical or all residential as noted above4. 250 or more hours of rental services are performed for the enterprise (see detail below)5.

And I get it that it may take several or all of your residential properties to purchase one larger commercial project. 

The title is held in the LLC for legal and tax purpose, but the mortgage is usually in the personal name of one of (or all of) the partners.

If it's worth it, they'll go after some or all of it, depending on the case.

I know you just can’t know what’s up in the attic, crawl space or all the little stuff.

The problem with BRRR's now is that if you can keep all your money out of the deal your debt service might eat up most or all of the cashflow on the property.  

If the borrower defaults on the loan, the lender has the right to foreclose on any or all of the properties used as collateral. 

On the other hand there are some people who get most or all of their syndications through these methods.3) Brokers: these generally don't do their work for free.

hello, I would like to know if I wanted to open a new LLC or even amend my current one to add multiple members and purchase rental property, would one member have to qualify for the loan or all? 

The best thing to do is focus on potential BRRRRs were you have the opportunity to get most, or all, of your money back out.Otherwise you'll be servicing HELOC debt and quickly be maxed out with the number of properties you can buy.