The idea is they want to add more long term rentals to the market to help with affordability.The mid-term market is interesting but then you are covering utilities, internet, etc.

That’s before factoring in utilities or each personal situation.

you can utilize a skip tracing company to get contact information for the owners.

Poop filling my downstairs shower and utility room. 

Purchased home with potential upside in hoping to force appreciation in the house in order to create equity and eventually utilize the equity (HELOC) to begin investing in other properties.

Unfortunately there's a lot of alarmist/scare tactics utilized to upsell these services that do nothing but generate revenues for those who are selling the service and often leave the clients with recurring expenditures i.e  annual maintenance costs.  

I feel in real estate if one is truly involved in it these are two of the most important sites utilized.

Utilized a Solo401k to purchase our first few properties.

My question is if we are marketing this as land, is more value added from the 2020 mobile home or the multiple utility hook ups?

If there issues that need to be worked out with the 6-unit property, I would utilize that as a negotiating tool to work out a seller financing strategy with the current owner.