The bigger items on my list include some plumbing, electrical, and replacing kitchen cabinets/sink. 

I'm not very experienced with flipping so I highly appreciate any good recommendationsHere are my first observations from what I see:2600sq ft duplex. 3+1 and 2+1Main floorNeeds paintMinor repair on floorNew kitchenPossibly new bathroomWater damage in one of the rooms ceiling and floor is in bad shapeSecond FloorPaintMinor floor repairNew kitchenPossibly new bathroomWater damage from one of the rooms, it is in bad shape.BasementCleanupPaintPossibly adding washer/dryerBackyardCleaning junkNew fence may beI've been told plumbing and electricity is working but need confirmation.

In another case, I bought a house with incomplete wiring, termite damage, and leaking plumbing. 

My understanding is that you need permits for specialty projects (electrical, HVAC, plumbing, etc.) and that it is common for the sub-contractor to pull permits for the work they perform related to those tasks.

- In my spreadsheets, I am estimating the cost of a 2 door garage conversion with existing plumbing to be 80k.

Has anyone had very good experiences with any of the following.Exterior siding, Masonry/Concrete, Site work (prepping for build), Trim, Plumbing, Electrician, HVACIf anyone knows some good people to work with would love suggestions.Thanks

Why not look at trades schools-carpentry, electrical, plumbing are all great jobs that give you a skill and pay well.

This is important, no one told me what was about to happen next.I had a local inspector come out and inspect the property, he once again found some things but none of it was serious, some appliances needing replacing, leaking faucets, etc.Then because I knew there were a number of water leaks, I had a local plumber come out and do a second inspection on the plumbing of the building, including the sewage and water lines in the crawl space.

I had a similar situation in Tampa years ago where the housing inspector came out and found my tenants had a horrible roach infestation, food all over the place, broken plumbing and a couple of broken windows. 

Rough in all your plumbing and make sure you have enough power for a sub panel if you’re doing one, maybe pre run all your HVAC.