The investor only needs a W-9 if they are paying you for something you will NOT be including on a 1099 and Annual Owners Statement (with your charges as part of the expenses).For any & every owner you manage for, you will need a W-9 from them, so you can send them the required 1099.You need to discuss with all with a CPA fast!

Lastly, lending requirements vary from lender to lender. 

It refers to one party (you) 'quitting' or giving up your claim to another party (your LLC).Partial answer: QC to your LLC may not be a DOS event if you follow the more recent lender guidance on the LLC requirements (I'm not sure what they are, just that they exist).

Any over that is fine but your requirement is just 12 months.

Lowell 5 will, but they require a first lien position, so it's really a refinance more than a HELOC at that point.  

Looking at and managing a property in another state would probably require a property management company, or something

We faced a zoning challenge that required us to obtain a variance for the second-floor addition due to front setback restrictions.

I recommend you check with competent Texas consul for advice or ask the settlement agent for a commitment which should have a requirement for a deed from whomever the underwriter will rely on for the conveyance together with whatever other requirements they will need met before insuring your interest in the property. 

If the site requires a step or steps to get it entitled to accommodate the planned improvements, each of steps has the potential to increase value. 

I’m also curious what lenders would offer me for percentage on the down payments, I put 5% down on my current Hi Emma, If you put 5% down, it sounds to me that you bought your primary residence. the minimum down payment on investment properties is 15-20% down.DSCR financing does not require personal income or personal debt to qualify, rather you will qualify based on credit, experience, reserves, and the debt coverage ratio.