Are there other ways to invest idle LLC cash in online savings or money market funds? 

One of your biggest challenges will be separating all the online fluff from reality.EXAMPLE: several S8 "gurus" have already been exposed as frauds, but unfortunately, they sucked in thousands of investors.You're an engineer, use your education & experience to start building up a logical approach to investing in rentals:)Start with this:Recommend you first figure out the property Class you want to invest in, THEN figure out the corresponding location to invest in.If you apply Class A assumptions to a Class B or C purchase, your expectations won’t be met and it may be a financial disaster.So, when investing in areas they don’t really know, investors should research the different property Class submarkets.

I dont post on facebook personally as I cant figure out how it works and or follow it.

Looking for a good online program for tenants to pay rent.

'Individual Taxpayer Identification Number' (ITIN) for each owner of the property (Each person listed on the property deed).

Same facts, except that John only has 3 days of personal use in the year. 

Find out the average lease time for your market and for the person asking you to sign.

As someone who built a 200 plus portfolio of SFRs ( section 8) I can attest that for ME Personally.

I'm looking at condos that are part of hotels/resorts, for occasional personal use (I travel a lot and need a place to come back to), and to have STR income when I'm away.

@Miguel Del Real if you are just starting out, and maybe you’ve never bought your own personal resident, it is risky to not have somebody in your corner.