You may want to start with one property as a test.BRRRR - requires to do identify properties that you can purchase under value, work with contractors, and have credit worthiness to refi(may need to wait the 2 years).Syndications - you have no power on what the syndication does(pro and con).

As far as buying in an LLC, that is probably hard to do without credit worthiness of an existing LLC.

Anything else we're missing from a future credit worthiness perspective, eligibility for future loans, etc.?

When doing a loan under an LLC, the lenders will want to see the credit worthiness of each managing member. 

For example, properties that are older and have fewer credit-worthy tenants may carry more risk, and as a result have a lower price, resulting in a higher cap rate.

If you are credit worthy, obtain traditional financing.

However, If you title in your personal name, you have the option to get a residential loan which has lower rates depending on your personal credit worthiness and income.

Start looking for a partner that is credit worthy.

They care about income, credit worthiness, work history, period.

Typically we request to review their financials and make a decision regarding their creditworthiness ourselves.