Using $30k as a starting point, it would seem that the overall budget would be anywhere from $300-600k which has a large amount of variation into the property to buy. 

It makes landlording so much simpler and you can totally avoid any type of fair housing issues.There are posts with a variation of this question on here regularly, and I see lots of replies ignoring fair housing violations or just saying landlords shouldn't worry about them for a multitude of reasons.

It will be some variation of residential, commercial, or industrial.  

This is an example of how it can transpire - there may be other variations.

@Zac Boelkow Yes, there are some variations in peak months for some markets, especially in the colder parts of the country. 

That could certainly be traditional basic key locks, key locks with a master key through a service like LandlordLocks.com, Schlage SmartKey system, or even the more basic, non-smart lock variations that most of the major lock companies offer as a parallel to their full Z-wave/Zigbee variants, often at 1/2 the cost. 

As for manufactured/modular homes most areas allow them, and they're viewed the same as stick built if they're on a permanent foundation, not sure there's still a big price variation with them though.

Leaving ambiguity leaves room for interpretation, which leaves room for variation.

Or any variation thereof.Continued success!

In Ohio there is no licensure for property inspectors and we have found there is a wide variation in the things they catch.