The two boys have never replied to any of my emails but she's been on top of replying and set up the account to pay the monthly rent automatically.

Different people possess a different set of skills and opportunity will not smile equally on everyone, certainly not at the same time.

We are setting up a Solo-401k with an LLC for investment-protection and checkbook control.

Hi Tom-Do you have a set of prequalifying questions you utilize when prequalifying a seller looking to sell their performing note backed by real estate(single family)? 

However there are set backs, especially if you're already at the top of the market.

If you have a lot of other debt aside from your mortgages then maybe it is too high, but cash flowing investment properties shouldn't hurt your ratios.

First few months should be focused on educating yourself on your local market, setting up a marketing budget, creating business cards, website, marketing materials to hand out etc etc etc.....you should expect the first few months to be difficult until your able to get a constant lead flow. 

DH is a network engineer and I have worked in ministry/non profit settings as well as customer service settings. 

As far as the payment, you can set up a PO box at the local post office and have him/her send payment there, if you want to be discrete.

@Andrew PflegerThere's been multiple threads about goal setting, and I'm picking up you're in that mindset where you're thinking about units.