I did not know this about registered contractors on the permit.

Even then the expat will need a work permit to legally sell anything in Panama. 

How many permits do I need to apply for a commercial project, and how many plans will I need from the engineer? 

I originally purchased this house to be nearby my grandmother in her last few years but realized quickly that it was a prime area for short term rentals as there are no zoning rules or permits necessary etc.

The costs involved are about $100.000 all in (permits, engineering, architects labor , materials ) - I’m thinking that would be a better long term Investment than another SFH . 

You should answer with, anyone over the age of 18 must apply and be approved to be formally added to the lease and permitted to move in.

Here's a link to the CSLB license check.https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/CheckL..One thing though...in my 33 years of contracting, I've had dozens of illegal permits pulled under my number leading to major problems.

I'd also check if renovations were done and if so were permits pulled? 

You need to pull a permit, then the Contractor has to take down the coping and bond beam a couple feet, then core holes in the pool floor (so it wont ever popout of the ground).

I do owe him 5k and told him the checks were ready for pickup but still no response 1- You hold that 5k until…2- Review the details in your contract, specifically Scope of Work, release payment descriptions3- Review contractor default or termination clauses or language in contract4- Review permit status with municipality, if permits were pulled.