You have a renovation project?

We have a large deck that needs refinishing. There are also spots of rotted wood that need to be replaced. Overall dimensions:
- 372 sq ft of decking
- 27 sq ft in stairs
- 82 linear ft of the railing (37"-38" high, ~200 verticals)

Details dimensions:
- landing: 36" x 51"
- staircase 1: 7 steps, 34" wide, 9" deep
- deck level 1: 13'8" x 12'
- deck level 2: 12' x 16'3"
- staircase 2: 2 steps, 8' wide, 9" deep

Apart from the landing and staircase 1, the whole deck is close to ground level: level 1 is about 18" up, and level 2 is about 8" up.

Job steps, if I were doing it myself:
1) strip remnants of old paint
2) remove rotten wood
3) replace rotten bits
4) wash the whole thing
5) sand it
6) stain it
7) seal it

As a co-owner of a triplex, my neighbor and I live on the top floors, and over the past year, we have had water infiltration coming in from the roof (which has since been fixed).

My neighbor:
- cracks in a few areas in the condo (on the ceiling), resulting in a slow leak during rain
- water dripping in from the window frame of the front windows

My unit:
- water dripping in from the window frame of the front windows
- large leak in the wall separating the hallway from the bathroom, resulting in large bubbles in the paint and sagging along the wall and the ceiling. Leaking within the pocket door frame.

We would like an expert to come in to determine the cause of the issue and to repair/replace all parts necessary in both units.

OPTIONAL: My unit also needs 2 pendant lights to be changed (in the staircase it would require a tall ladder. Someone who could also do this would be appreciated, but not required.

Main floor of a Duplex building to be fully painted ( 5 1/2 )
Includes: Entrance/hallway, Living room, Kitchen, Bathroom and 3 bedrooms.