Interior remodel, paint, floor, appliances, fixtures, etc Lessons learned?

Can you arrange for counters, floors, painting other “basics” without him tacking on his 20%?

I'll pay so much when demo is done, I'll pay some when painting is done, balance due when the job is complete. 

Renovated the basement unit, new roof, new soffit/ facia, new gutters, new exterior paint that was paid for by seller.

The tenant fails to pay their last month's rent and leaves the place needing new flooring and paint.

Now, three years later, my tenant reported cracks in every room—paint cracking and full-line cracks in the bathroom, living room, and bedroom (walls, ceiling).A drywall contractor looked at it and said it’s normal wear and tear, but I’m concerned since it’s in every room.

We will be installing new cabinets, floring ,paint etc. 

Painting and flooring are super easy.

Security Deposit: 2600Lease states no smoking/painting walls/no hanging things on wallsTenants have moved out and have left two truck loads of garbage to be removed.Damaged doorPainted walls which got on the ceiling and trim Lots of holes on the walls throughout the houseDamage from windows being left open constantly Weed was clearly smoked in the house (smell throughout the place) so we need to deep cleanWater bill wasn't paid so I had to turn back on utilityMissing keyQuoted costs:$450 junk removal (some furniture)$935 for damaged doors/windows, painting cleaning$30 for utility turn onTenants were only there for a year before moving out so a lot of this is beyond normal wear and tear. 

(i.e. initial decorating and painting, bookings, rate structures, marketing, bookkeeping housekeeping, etc)?