I keep around five rentals per LLC, and I am in Jacksonville, FL, where my homes are worth around $250-350k. 

It's worth reaching out to Corporate Housing Groups (most HR Departments at large employers have this division as well as Relocation Companies that you can find via an internet search) to offer your property as a 30-day furnished rental.

Is it worth investing in SFRs for a part-time, non-professional investor?

Carrying costs in purchase and or rehab is financed, cost of capital on refi, re-recording, title, updated insurance, etc. their are many costs at play after initial funding then to transition long term unless your straight cash on the front end.

I rented it out for 4 years now turning it into a airbnb it is now worth 400K What was the outcome?

maybe only be extra $40,000 to build open loft... and I would guess I could possibly charge $2000/mo rent, not sure>>***I was kinda crunching numbers...if I'm estimating it correctly it will take me over 4.5 to 6.5 years in excess rent to make up the cost of building the private loft.....does that seem worth the extra loft cost?

I didn't realize the construction work is paid out of pocket and then reimbursed, so I had to nuke a lot of my bitcoin to pay for the first 12k worth of work to get the project started, so unless your lender gives you some construction money up front, you'll need to account for that too.

I assume that this is a SFH so they probably won't have the best records.

Might be worth it to hire a PM, or to look into getting a professional screening service.

Also there are probably paid options that pull public records like landglide, propradar etc, or try your local title company rep.