Additionally, the beach is still within reach...just a short 1 hour flight or 6 hour drive.  

This could be minor, or major work that we wont know about until that inspector comes out. 

You may want to share you analysis with a few banks and/or property managers as they will typically weigh in on your assumptions if they are potentially interested in working with you. 

Would greatly appreciate advise on how to start sourcing the land and/or connect me to land brokers who can help.Thank you in advance!

A tax pro will not save you time or effort but they may assist if you're unsure. 

Or recommend any builders?

If your business is worth significantly more than what you owe on it, you may be able to borrow against that equity to fund your first deal—rather than walking away from a potentially appreciating asset.Some investors take this route, keeping ownership of their business while using its value to qualify for financing or attract a capital partner.

Consider starting small by house hacking a single-family home, renting out rooms, or adding an ADU if possible.

., property management companies aren’t legally required to carry general liability insurance, but it’s highly recommended for protection against bodily injury or property damage claims.

I cant speak for what this seller will or wont do, but my suspicion is that an offer accompanied by a balance sheet or list of collateral and not liquid funds wont fly - it wouldnt with me.