Single-family homes are generally more affordable and due to the higher demand and focus, they tend to appreciate more than MFHs.The valuation of single-family properties focuses more on supply and demand factors while MFHs are valued based on the rental income and the conditions of the property itself.

That will def need to be factored in to my plan.

Factor how many properties a year you will purchase and or sell, factor that in to the costs and time of being licensed.

That being said, there are several other niche factors in operations and valuation for multifamily vs MHP, but MHP have less supply in solid markets which is makes the ability to scale much more difficult. 

What other key factors should I look into?

There maybe other non financial factors that weigh into your decisions that must be considered.

This can even be  a factor if use or distribution took place on the property.I'm looking forward to hearing your experience!

So the appreciation factor is alluring as well. 

It's mostly just about the numbers.The most important factor is the debt-to-income ratio which determines how much you can afford. 

One factor that I don't know enough about is the potential change to my property tax- I'm assuming that the property gets reassessed, but how does the new value get calculated?