@Keoki Kimzin I often go back to my first reno where we used the least expensive product home depot had to offer for everything.
Three years later here is my take. (its a rental so I still own and monitor the property)
Kitchen::
Appliances: Go Cheap - we used the lowest priced stainless appliances with decent online reviews and they are kicking along just fine. Haven't had a call on appliances.
Counter tops: Formica is still looking just fine.
Cabinets: Went cheap - these are holding up OK but showing signs a wear - looking back I would bump up to middle grade here.
Sink and faucet: Had a hook in this department and went away from the depot - Middle end stainless and still working great.
Bathroom:
Vanity - wish I spent a little more. While still functional the vanity is starting to show chipping and signs of wear and tear.
Toilet: Medium - good here.
Shower pan - Medium - good here.
Shower Head - went cheap and had to replace too before we went high end - good ever since.
Tile floor - cheap - good here.
Make sure you have a ceiling light / fan combo - steam from shower will beat on paint.
Other items -
Insulation - sort have been doing it in pieces. Wish we just had someone blow it out and took advantage of energy efficiency rebates. More energy efficient homes are just better for everyone. You, the planet, the tenants.
Best of luck and keep us posted!