Strictly my opinion ...No, we're not in or approaching a "bubble".We ARE, however, in a housing shortage.This was predicted just after the crash of '07 / '08 when some 80% of builders and developers went under.

The other thing to do is write the offer and present it; unless under strict instruction from the seller not to present an offer, the listing agent must present the offer to them. 

Did he actually rewire the house or just use existing wiring and bring plugs, switches, and visible components up to code?

Also, how does your insurance company feel about renting out a unit not up to code? 

So we went to get it subdivided into 4 equal lots.The survery district approved 4 , 1200 sqft lots but it did not pass zoning code for RSA-5 district .1.

You need to look at Miami zoning code, landlord tenant regulation.

We understand that there are building codes that we have to follow and permits that we have to get from the building department.Does anyone know if we need something from the planning department?

Forget about the LLC and asset protection classes, be good, have insurance (an umbrella when you get rich) and abide health and safety codes you will be fine.

And call a few Lenders who strictly go by FHA guidelines and don't implement their own overlays.Hope this helps and good luck!

They will examine the zoning code and advise as to how big your structure could be to comply with all relevant ordinances.