Appraisal would help only to the extent you need to learn how to estimate value using the comparison method (comps). 

I've had very few problems in comparison with others over my 11+ years of landlording.  

@Lee LiuThere are three approaches to value  The Income Approach, The Cost Approach and The Sales Comparison Approach. 

There is no comparison.

Hello, My future father in law bought a property in 93 which is an 8-plex in LA for around 300,000He owns his own home currently ( beautiful home)and owns a rental also ( I don't know when he purchased this)He also has a real estate license ( he isn't an active realtor, he is retired and just invest in stocks now)He believe california for the place to purchase property because you can see and feel it.I am trying to convince him that just because its out of state, doesn't mean it can't be successful.He says that unemployment is higher than anywhere else in the USACalifornia and Nevada are both around 6.7-7.1% He says thats because obviously the population is much higher in california so its not comparison He believe with the indian reservations in california, it will turn vegas the unpopular place to gamble and all of the las vegas community is fueled by gambling and entertainment. 

Columbus is such a great character for this comparison .

I have two Section 8 tenants, it seems like it is percentage based...on what their income is in comparison to the rent.

I understand it's not a priority compared to medical bills but usually pretty small by comparison.

They submitted applications, we screened them and then offered the property at rent greatly discounted in comparison to other similar properties we own in the neighbourhood.  

The relative comparisons in my mind are direct mail marketing (as a wholesaler) or house flipping.