You also will still need to manage your property manager  - ie, stay on top of expenses, ensuring your property is being managed effectively etc. 

Some will tell you to make the change anyway but that seems a large risk in this high interest rate environment.

A high property tax rate will increase the taxes more quickly as a percentage of total expenses when the property value increases.

I have to check on codes/laws/regulation, but I know CA is on a high of making thinks convenient to build those at the moment.

Where these numbers are found, there is a very high rate of rent actually being paid.We have over a dozen Fortune 500 companies just in Metro Detroit with huge Healthcare, Auto, and mortgage industry National footprints.

This is very common, and highly successful.

Key Questions:Would it be more financially prudent to sell the rental property and pay off a chunk of my high-interest primary mortgage (7.375%), and use the remainder for a fix and flip?

For almost $100k a lot you want a pretty high NOI to make sense of it, like over $300k IMO I agree.

I got the Discover It Secured card in high school and used that to build up my credit. 

I had similar thoughts as to why they would want to take over payments on a brand new mortgage at a high rate.