Having the seller carry a second is not a problem for the first, as long as their business with you is finished and the loan has closed.

I know it's not as flexible as a HELOC but as long as your deal flow is good and the tenants are paying the mortgage you won't come out of pocket for it. 

all of them. as long as the numbers work.

As long as you do with the same lender they can cross collateralize. 3.  

Do my 3 associates need to create a LLC to be able to do these renovations or can any individual do them, as long as proper permits are pulled? 

If it's worth that much, taking a HELOC on it should not be an issue at all long-term or short-term as long as the bank will do it.

Quote from @JD Martin: Quote from @Benjamin Weinhart: Speaking to your item #6, I was actually told by the staff here over the phone maybe 5-6 months ago that DMing someone is fine so long as it's not a copy/paste ad and is specific to the individual.

I wouldnt, so long as you have your requirements laid out - they should be able to know if it is even worth applying.

A shower is generally acceptable as long as it meets building code requirements for plumbing and drainage.

If you did, you could take advantage of some unique strategies, like renting it out while traveling (as long as it’s for 14 days or less) and having that rental income be completely non-taxable.