@Mattin Hosh first, most cities in Metro Detroit have some type of rental property inspection every 2-3 years.It's not really a big deal 99% of the time - especially for owners who are NOT slumlords:)Also, a quick Google search will show that several states/cities are passing/considering similar legislation.One of the biggest mistakes we see newer investors making is NOT properly understanding Neighborhood/Property/Tenant Classes and naively assuming that any rental they buy will deliver Class A results.Read our copy & paste thoughts below and DM us if you'd like to dicuss more about the Detroit market:)-------------------------------------------------------------------------------------------------------Recommend you first figure out the property Class you want to invest in, THEN figure out the corresponding location to invest in.Property Class will typically dictate the Class of tenant you get, which greatly IMPACTS rental income stability and property maintenance/damage by tenants.If you apply Class A assumptions to a Class B or C purchase, your expectations won’t be met and it may be a financial disaster.If you buy/renovate a property in Class D area to Class A standards, what quality of tenant will you get?

@Patricia Smith Even if someone give you a referral, what meets their expectations, may not meet yours.In our experience, the #1 mistake owners make when selecting a Property Management Company (PMC) is ASSUMING instead of CONFIRMING.It's often a case of not doing enough research, as they don't know what they don't know!

No mistakes have been made here.

Do number, size, or area of investments owned play the biggest role in that decision? 

Some people seem to get locked in to one place they find, or a place a friend or family member is selling without really evaluating the available market.In a small town in East Texas I would think your biggest risk is a big player coming to town that can absolutely crush a smaller player. 

You're facing a common investor challenge: learning from experience (and sometimes mistakes).

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

What was your top 3 biggest lessons learned?

Lets add this mistake to my long list of Mistakes.

Selling before death would be a costly mistake   - you did not explicitly state this was not a multi family but it seems likely from your description.