I'll add that I once tried to use an epoxy kit to paint shower tile that was a dated.

I could have put a bandaid on as it still worked but I pride my houses in being higher end and good quality.As we continued with the house, I ended up putting in over the top finishes such as heated tile floors in the master bath and sound insulation under the hardwood floors to reduce noise transmission to basement.

A simple reface with tile from the mantle down will be less exp and will give the buyer more options.

You can also put granite over existing counter by removing tiles etc and paint it over. 

It also has a tile version which we will use for the laundry room of the flip.This is the laminate.https://www.lumberliquidators.com/ll/c/Boardwalk-O...The question is: should I use the same laminate in the two unit rental?

Work I did myself: Installed new ceramic tile in the kitchen, basement, and bathrooms; painted; installed new kitchen appliances; installed new garage door; installed new screen door; updated landscaping; replaced water heater; updated bathrooms; added kitchen cabinets.

If you plan to hold, having new plumbing, electrical, tile, cabinets, etc will be nice as well. 

We've been in the house 6 years, and we've done a good amount of remodeling- drain tile in backyard, fenced in backyard, new high efficiency furnace, remodeled bathroom and kitchen.

We pushed the wall into Master bedroom further, and made a huge full tile shower, and double vanity.

Look up the costs of materials for various things (Flooring, cabinets, granite, shower tile, vanities, fixtures, fans, windows, doors, baseboards, etc) and then look up the local flooring installers, cabinet installers, countertop fabricators, shower tilers, window installers, etc. and ask them how much they charge for labor on certain things.