Wall wash with TSP prior to painting if possible,, if the ceilings are flat (not popcorn) wash also, a sponge mop with a towel over it works great and fast..2 buckets one wash one rinse.you wash everything,, doors, trim, floors, cabinets, light fixtures, all windows glass and tracks.Bleach is ok to use but I've found that TSP is best thing to actually REMOVE the nicotine,, you'll be shocked when you see how well it works. 2 Prime, Kilz primer to seal anything your going to paint.3 Remove all blinds, throw them away the plastic retains the odor and they'll be gross anyway.4 Air Ducts if you can reach inside wash out.. then spray Kilz in them as far as you can reach with the system off.  

@Stephen Kiser I built 10' ceilings and 9' ceilings, wood frame, wood floors 1st floor, carpet 2nd, granite tops, shaker cabinets, hardiboard siding, shingle roof, GE appliances.  

Cabinets, solid surface counters, appliances.

Breaker panel sits behind a cabinet and this is not in compliance.

Let's take a real example: I'm renting a condo 2bed/1.5bath for $925/mo right now - it's listed yesterday.The owner bought it for $17K, invested $5K - new cabinets, flooring, HVAC, HWT, paint.

As @Nolan Martineau stated, each property will have different Capex due to age of furnace, water heater, roof, AC, cabinets, etc. etc, etc. 

We spent a few month making it very modern and attractive - moved W/D upstairs, new appliances, removed walls, refinished hardwoods, granite, new cabinets etc.  

New cabinets, floors, doors, trim, windows, light fixtures.

Possibly see if you can reroute the gas line from where it currently protrudes from the slab by running it along the wall through the studs or along the interior back of the cabinets.

They were in the upstairs bathroom cabinets (and possibly the wall behind the cabinets).