He goes to the site and provides an estimate to me that I will hold him to and he also pulls in his realtor friend to ensure my estimated ARV is correct and we can sell at the highest point. 

Hey @James Yang great questions, and I'll try to provide perspective below.

Also many PM companies do not allow applications provided to tenant to be re-used.

I'll pass...VRBO is a marketing platform not a pricing software.

Howdy y'all!
I’m kind of new to this all. I sign up for this all in 2019 for this is the first time I’ve logged in.
I bought a place in 2018, remodeled and sold in 2022 and chased my dream of 20 years of moving to J...

Other brokerages website as they must provide the name of the listing agent.Good Investing...

As far as mobility goes, this is what I'm personally hoping to accomplish in my life outside of real estate, there are plenty of resources (tumbleweedtinyhouses.com) that provide information regarding the legalities of what is considered to be a "mobile" home and everything involved on that end of things.

Please provide me your contact details to reach-out to you. 

Quote from @John Underwood: Also insurance rates are cheaper in SC than FL.Heavy emphasis on this one, especially if you are doing any kind of BRRRR, not only will insurance be expensive, but might also be tricky to find as some providers have stopped servicing FL all together. 

Shopping for insurance, appealing assessed values, shopping utility providers, making energy efficiency improvements, etc.