It's hard to say where the smart lock journey is going but the company that stays flexible and evolves to create the most compatible (door- and lock-types), easy to install, maintain and use solution, will be around in years to come.

You do spend more maintaining the properties, but in my opinion, it is well worth it.  

If your following the laws and maintaining the properties your fairly safe to begin with.

To heat a large 3br apartment, electric heat would be really expensive, and those ductless wall systems I hear require a lot of upkeep/maintenance which I can't depend on tenants to do and would prefer not to have to be there once a month to maintain myself. 

This tenant is great and I like maintaining a good rapport.

I would like to maintain the property, but also ensure costs are low for lawn care. 

There are some beautiful and well maintained manufactured home parks..I've toured them......like everywhere, it's all about the level of development you are looking at. 

There are yearly expenses of about $2000 to maintain the company. 

Investing in performing and non-performing notes is a great way to make invests backed by real property.Performing notes provide a passive income, similar to having a renter but without the midnight plumbing issue calls and the borrower has a vested interest in maintaining and keeping the property.A non-performing note, isn't typically passive at first but depending upon the borrower’s situation and performing the proper due diligence in advance, there are multiple exit strategies for above average ROI’s; reinstating the borrower or foreclosing if necessary are two examples.That is the real cliff notes version of the process. 

—In all criminal cases, contempt cases, and other cases filed pursuant to this chapter, if a party has sold, leased, or let real estate, the title to which was not in the party when it was offered for sale, lease, or letting, or such party has maintained an office bearing signs that real estate is for sale, lease, or rental thereat, or has advertised real estate for sale, lease, or rental, generally, or describing property, the title to which was not in such party at the time, it shall be a presumption that such party was acting or attempting to act as a real estate broker, and the burden of proof shall be upon him or her to show that he or she was not acting or attempting to act as a broker or sales associate.