LLC structure for Single Family Portfolio

[Uma Subramaniam]

My husband and I are real estate investors in Dallas-Fort Worth area in Texas. We currently have 15 Single Family rental properties on our personal names and are in the process of getting a commercial portfolio loan for 70% LTV. We are exploring options to set up the correct LLC structure.

1. Single LLC to hold all 15 properties - Lender prefers this to keep the underwriting simple and helps us with lower origination cost

2. Series LLC - Seems not every one is on the same page (CPA, Attorney, Lenders, Banks, Title Company, etc) - An Attorney is asking $6,500 to set up the LLC and series. Any recommendations?

3. Single Member Disregarded LLCs for each property - Will a single mortgage for all properties affect asset protection?

Any suggestions on an efficient LLC structure both from the asset protection and property management perspective? Thanks in advance!