I did this for a buyer from England who was here for SXSW.  

I've never personally done it, but a co-worker of mine bought a pressure washer and does pressure washing on the side...maybe $500-$1,000 investment (less if you don't go commercial grade) and you can get $100 per job on the weekend.

From time to time, my dad (who lives where I invest) will go to a property to meet with a tradesman, unlock a door or perform a random task (like empty the coin op washer/dryer).

Fixed grading to keep water out of the basement, painted exterior, changed out 3 windows, repaired some electrical and plumbing, new water heater, new heating/cooling system, added washer and dryer for tenants Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

Cheapest route I found is white, blank chloroplast signs on amazon, a box of magnum sharpie markers, nails with plastic washer on them at big box store, and my wifes nice handwriting.

After a new refrigerator, washer & dryer, blinds, and few minor repairs the property will be in rent-ready condition. 

There are no washer dryers.

Basically needs new tile, cabinet doors, appliances (including washer and dryer) 2.

The 2 best improvements we made were flipping a coat closet originally facing the living room 180 degrees to face the kitchen to be used as a pantry, and the installation of a center island and range which allowed us to add a dish washer that previously did not exist in the kitchen.

Unit # 1-1st floor-1 bedroom, spacious, bright rooms, large windows, EIK, ornate fireplace,washer/dryer hook up $750.00 Unit#2- 1st floor 1-bedroom unit- rear lots of privacy completely renovated $850.00 Unit # 3 2nd floor 2 bedroom unit, brightopen & airy floor plan.