As a landlord with numerous Section 8 tenants, I can attest that participating in the program can be a great way to secure reliable rental income.

Can I buy land with an SDIRA, hold it for a period (2yrs for example) and then sell it to a company that I own?

Florida rental real estate is purchased (cash) by a Florida Land Trust (FLT).2.

I approached a few different property owners who had vacant land as I thought of building and most times was told STRs were not allowed due to zoning. 

I already have an umbrella policy so not sure if upping that premium or moving it into any sort of trust/land trust or something else would be a smart move. 

If you don't know your landlord tenant code, how to give proper notices, how long you have to fix maintenance issues, how to evict if needed, etc...you should hire a property manager

Subdivided off the adjoining 3 acres to become free and clear and now am developing into 9 more units using the land as down payment for construction.

REI areas of interest (what I like learning about and may take action on):Small Multi-Family AND converting SFH to multi-familyFix and FlipBuy and Hold long term or mid-term rentalsBRRRLand Flipping and Land EntitlementsModular/Mobile/Tiny homesForeclosures and Tax LiensAbout Me: 40 yrs old, married, working mother of 2.

Otherwise, the landlord could hire you to collect bookings, fire you, and keep all the money.I recommend you look at other aspects of your management contract.

Landlord Tenant laws are challenging but if you invest in the better neighborhoods, you are less likely to run into the issues landlords customarily face in the low income areas of the city.