He paid for common area access, built a bed in his Land Cruiser, pocketed the rent but we had agreement on what the pocketed money could be spent on (seeing we were paying the rent). 

.✅ Any home built before 1980, likely has cast iron or clay sewer lines which will deteriorate over time.These issues can be avoided.

The city is experiencing rapid growth, leading to a high demand for housing and employment opportunities.

For me, I had no goals but found that two of the deals that I did, the seller looked me up on FB and said that they felt good about me pretty much because they got to know me through videos / posts that I made and I suppose that it built trust with them. 

I successfully run 1 STR and have a 2nd that an inherited PM handles.I have Vrbo and Airbnb they will sync with each other with no external software.I set pricing easily by using the built in tools that Vrbo provides.Automated messages are built into both platforms.Vrbo keeps my calendar slammed, but I take direct bookings as needed, simple to do.I have no additional 3rd party fees to very sucessfuly run and manage my property needing only a a few minutes per week.

But I feel I see some people grow rather rapidly. wasn't sure if they were using some sort of other method to get ahead. 

You can hear real-world examples of how others have built their investment portfolio and (hopefully) learn to avoid their mistakes.4.

They seem to have good number of properties under 100K built in and around 2000's.

I suspect most of those folks will  be somewhat upside down if you take in all the interest they paid on half built homes and the cost to put those homes back into production.How are lot prices in Lehigh ??

This implies residential units can be built at lower costs than ADU additions and provide better return. 11) adding an ADU to SFH can make the SFH fall under rent control.